protons and neutrons are made from which of the following?
hadrons
down quarks only
up quarks and down quarks
up quarks only

Answers

Answer 1

Answer: it would be c. Protons are made of two Up and one Down quark. The neutron is made of two Down and one Up quark

Answer 2

Protons and neutrons are made up from quarks and in protons two up quarks & in neutron two down quarks are present.

What are quarks?

Quarks are the fundamental or elementary particle of any matter present in the system, and quarks are combined together for the formation of a hadron.

Protons and neutrons are the examples of hadrons which are also made up of quarks.

Protons are formed by the combination of two ups quarks and one down quark.Neutrons are formed by the combination of two dowm quarks and one up quark.

Hence protons and neutrons are formed by the quarks.

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Related Questions

which group of extremophiles does thermus aquaticus belong to

Answers

Answer:

The correct answer is thermophiles.

Explanation:

Thermus aquaticus are heat resistant bacteria because these bacteria can survive under adverse environmental conditions like high temperature.

These bacteria belong to one of the most heat-loving groups of extremophiles that are thermophiles. Thermophiles are present in volcanic soil, geysers and around deep-sea vents where the temperature is extremely high.

Thermus aquaticus bacteria is used to manufacture an enzyme called Taq DNA polymerase, which is heat resistant and also an important factor in molecular biology.

Answer:

thermophiles is correct on edge

Explanatio

volume of carbon dioxide gas evolved at STP by heating 7.3 gram of Mg(Hco3)2 will be​

Answers

Answer:

1.12dm³

Explanation:

The reaction is a decompositon reaction. It is expressed below:

Mg(HCO₃)₂ + Heat → MgCO₃ + H₂O + CO₂

This is the balanced reaction equation.

We have 1 mole of Mg, 2 mole of H, 2 mole of C, 6 mole of O on both sides of the reaction.

To calculate the volume of CO₂ gas evolved at S.T.P:

We work from the known to the unknown.

The known is Mg(HCO₃)₂ and the unknown is CO₂

1. Find the number of moles of Mg(HCO₃)₂ from the given mass

2. Since we know that chemical reactions obey the law of conservation of mass. The balanced chemical reaction shows that, 1 mole of Mg(HCO₃)₂ would give 1 mole of CO₂

3. We use information from (2) to find the number of moles of CO₂. With the number of moles of CO₂ found, we use the formula below to find the volume evolved at S.T.P

Volume evolved =

number of moles of CO₂ x 22.4dm³mol⁻¹

Solution:

Given/known parameters:

Mass of Mg(HCO₃)₂ = 7.3g

Step 1:

Number of moles

of Mg(HCO₃)₂ = mass/molar mass

Molar mass of Mg(HCO₃)₂ :

Atomic mass of Mg = 24gmol⁻¹

H = 1gmol⁻¹

C = 12gmol⁻¹

O = 16gmol⁻¹

Molar Mass Mg(HCO₃)₂

= [24 + 2{1 + 12 + (16 x3)} ]

= 24 + 2(1 +12 + 48)

= 24 + 122

= 146gmol⁻¹

Number of moles of

Mg(HCO₃)₂ = 7.3g/126gmol⁻¹ = 0.05mol

Step 2:

We know from the balanced equation that:

1mole of Mg(HCO₃)₂ = 1 mole of CO₂

So: 0.05mol of Mg(HCO₃)₂ = ?

This would also produce 0.05mol of CO₂

Step 3:

Volume of CO₂ evolved =

number of moles of CO₂ x 22.4dm³mol⁻¹

= 0.05 x 22.4

= 1.12dm³

The volume of CO₂ gas evolved at S. T. P is 1.12dm³

The volume of carbon dioxide gas evolved at STP by heating 7.3 gram of Mg(HCO3)2 will be 1.12 L or 1120 ml

Further Explanation: Molar gas volume Molar gas volume states that one mole of a gas occupies a volume of 24 liters when the gas is at room temperature and pressure (rtp), while one mole of a gas will occupy a volume of 22.4 liters at standard temperature and pressure (STP).Decomposition reactions These are reactions that involve break down of a compound to small molecules or atoms. Decomposition may be carried using heat (thermal decomposition) or using a catalyst (catalytic decomposition).An example;

The reaction is a decomposition reaction;

Mg(HCO₃)₂ + Heat → MgCO₃ + H₂O + CO₂

From the reaction

1 mole of Mg(HCO₃)₂ produces 1 mole of CO₂ after decomposition.

Therefore, to determine the volume of CO₂ produced by 7.3 grams of Mg(HCO₃)₂

Step 1: Moles of Mg(HCO₃)₂ in 7.3 g

Number of moles = Mass/relative formula mass

RFM of Mg(HCO₃)₂  =146.33868 g/mol

Therefor;

Number of moles = 7.3 g/146.33868 g/mol

                             = 0.04988

                             = 0.05 moles

Step 2: Moles of Carbon dioxide

From the equation;

1 mole of Mg(HCO₃)₂ produces 1 mole of CO₂ after decomposition.

Therefore;

Moles of carbon dioxide produced is 0.05 moles

Step 3: Volume of Carbon dioxide

From molar gas volume;

1 mole of  CO₂  at STP occupies 22.4 L

Thus;

0.05 moles will occupy;

= 0.05 × 22.4 L

= 1.12 L or 1120 mL

Therefore; volume of carbon dioxide gas evolved at STP by heating 7.3 gram of Mg(Hco3)2 will be​ 1.12 L or 1120 ml

Keywords; Decomposition reactions, molar gas volume, relative formula mass, moles

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Level: High school

Subject: Chemistry

Topic: Moles

Sub-topic: Molar gas volume

What is the molarity of a solution in which 10.0g of AgNO3 is dissolved in 500. mL of solution?​

Answers

Answer:

[tex]\boxed{\text{0.118 mol/L}}[/tex]

Explanation:

[tex]\text{Molar concentration } = \dfrac{\text{moles}}{\text{litres}}\\\\\text{c} = \dfrac{n}{V}[/tex]

1. Convert grams to moles.  

[tex]\text{Moles AgNO}_{3} = \text{10.0 g AgNO}_{3} \times \dfrac{\text{1 mol AgNO}_{3} }{\text{169.87g AgNO}_{3} } = \text{0.058 87 mol AgNO}_{3}[/tex]

2. Convert moles to litres  

[tex]\text{V = 500. mL} \times \dfrac{\text{1 L}}{\text{1000 mL}} = \text{0.5000 L}[/tex]

3. Calculate the molar concentration

[tex]c = \dfrac{\text{0.058 87 mol}}{\text{0.5000 L}} = \text{0.118 mol/L}[/tex]

The molar concentration of AgNO₃ is [tex]\boxed{\textbf{0.118 mol/L}}[/tex].

The molarity of a solution in which 10.0g of AgNO₃ is dissolved in 500. mL of solution is 20M.

What is molarity?

Molarity of any solution is define as the number of moles of solute present in per liter of solution.

M = n/V, where

n = moles of solute AgNO₃ = 10g

V = volume of solution = 500mL = 0.5L

On putting values on the above equation, we get

M = 10/0.5 = 20M

Hence required molarity of solution is 20 M.

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A balloon contains 0.218mol of gas and has volume of 4.8 L. If an additional 0.075 mil of gas is added to the ballon, what is the final volume and how many molecules of gas are in the cylinder?

Answers

Answer:

1. 6.45 L

2. 1.76 x 10²³ molecules

Explanation:

1. Avagadros law states that volume of gas at constant temperature and pressure is directly proportional to the amount / number of moles of that gas

we can use the following equation

v1/n1 = v2/n2

where v1 is volume and n1 is number of moles at first instance

and v2 is volume and n2 is number of moles at second instance

at the first instance - n1 = 0.218 mol

second instance - n2  = 0.218 mol + 0.075 mol  = 0.293 mol

substituting the values

4.8 L / 0.218 mol = v2 / 0.293 mol

v2 = 6.45 L

new volume is 6.45 L

2. 1 mol of any substance is made of 6.022 x 10²³ units. These units could be atoms making up elements or molecules making up a compound.

therefore if 1 mol consists of 6.022 x 10²³  molecules

then 0.293 mol consists of - 6.022 x 10²³ molecules/mol x 0.293 mol = 1.76 x 10²³ molecules

therefore there are 1.76 x 10²³ molecules now in the cylinder

What type of reaction does this chemical equation represent

CH4 + 2O2 ➡️ CO2+2H2O+ energy


A. decomposition
B. Endothermic
C. Exothermic
D. Synthesis

Answers

Answer: exothermic

Explanation: It is a combustion reaction with methane.

The given chemical equation is representing the exothermic type of reaction. Therefore, option (C) is correct.

What is an exothermic process?

An exothermic process can be demonstrated as a thermodynamic reaction that emits energy from the system to its surroundings, generally in the form of heat, light, or sound.

While an endothermic process is defined as an opposite of an exothermic process where the heat gets energy in the form of heat. The chemical bond energy in chemical reactions is transformed into thermal energy.

In exothermic reactions, the change in the kinetic energy of molecules when the heat is liberated. The electronic transition from one energy level to another causes light to be released.

The combustion reaction is the exothermic reaction therefore, the combustion of methane liberates heat along with carbon dioxide and water. When methane reacts with oxygen gas, it produces energy along with the other products of the combustion reaction.

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A 225 g sample of an unknown solid is heated 67C and placed into a calorimeter containing 25.6 g of water at 15.6°c. If the final temperature of the solid sample and the water is 53°C, what is the specific heat of the solid?​

Answers

Answer:

= 1.271 J/g°C

Explanation:

Heat released by the metal sample will be equivalent to the heat absorbed by  water.

But heat = mass × specific heat capacity × temperature change

Thus;

Heat released by the solid;

= 225 g × c ×(67 -53) , where c is the specific heat capacity of the metal

= 3150 c joules

Heat absorbed by water;

= 25.6 g × 4.18 J/g°C × (53-15.6)

= 4002.0992  joules

Therefore;

3150 c joules = 4002.0992 joules

c =4002.0992/3150

  = 1.271 J/g°C

when baking soda and vinegar react, the product includes bubbles. what mostly likely occurred?

Answers

When baking soda, (a base) and vinegar (a acid) are mixed together, there is a chemical reaction, taking place, making the two diferent substances, one substance, that is now neutral.

The table lists the half-life for four different isotopes of sulfur. Equal amounts of each sample are stored in sealed jars. Which Jar will contain the least amount of the isotope of sulfur after 10 seconds ?

Answers

Answer: A sulfur-30

Explanation: for Plato it’s right soo

After 10 seconds sulfur-30 would have decayed more because it has the least half-life.

What is Half life?

The half life of an element is the time taken for the element to decay to half of its original mass.

After 10 seconds;

Sulfur-30 would have decayed by 10/1.18 s times. This will approximately 8.5 times.

Thus, after 10 seconds sulfur-30 would have decayed more because it has the least half-life.

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1. True or False? A Hertzsprung-Russell (H-R) diagram is a convenient way to see the relationship between the luminosity and the brightness of stars.

2. Convert the following temperatures.
A. B. C.
3. On an A.
B. C. D.
___ Kelvin = 100 oCelsius 0 Kelvin = ___ oCelsius 273 Kelvin =___ oCelsius
H-R diagram,
luminosity decreases from bottom to top.
temperature increases from left to right.
temperature decreases from left to right.
absolute magnitude increases from top to bottom.
4. What does a single dot on an H-R diagram represent? ________________________________ ________________________________
5. Which statement describes how a star moves within an H-R diagram?
A. A star never moves once its position is established on the diagram.
B. A star always stays in one region its entire existence.
C. A star migrates from one region to another as it goes through different stages.
D. All stars start in the upper left corner and travel through each region until they reach the bottom right corner.



6. On the H-R diagram above, identify the types of stars in the regions next to the lines 6A and 6B.
7. On the H-R diagram above, identify the general location of our Sun and label it.
8. How can you use the H-R diagram to find out if a giant star could have the same temperature as a red giant star? ________________________________ ________________________________ ________________________________ ________________________________
9. A star’s spectral class is most dependent on
A. its size and shape.
B. its color and temperature.
C. its luminosity and gravity.
D. its age and size.


10. The star Rigel in the constellation Orion has an absolute magnitude of 0.18 and is about 250 parsecs away. What is its apparent magnitude? Does it look brighter or dimmer than the star Vega to us? Vega’s apparent magnitude is 0.04. ________________________________ ________________________________ ________________________________ ________________________________ ________________________________

Help

Answers

Answer:

1 is true

I haven't read the rest!

A Hertzsprung-Russell (H-R) diagram is a convenient way to see the relationship between the luminosity and the brightness of stars. This statement is true.

What is A Hertzsprung-Russell (H-R) diagram ?

The H-R diagram, also known as the HR diagram or HRD, is a scatter plot of stars that shows the relationship between the stars' absolute magnitudes or luminosities and their stellar classifications or effective temperatures.

373.15Kelvin = 100°Celsius, 0 Kelvin = -273.15°Celsius 273 Kelvin = -0.15°Celsius.

In the Hertzsprung-Russell (HR) Diagram, each star is corresponded by a dot.

All stars start in the upper left corner and travel through each region until they reach the bottom right corner.

The Sun is near the center of the main sequence, and stars spend the majority of their lives there.

The red-giant region is located in the upper right-hand corner of the H-R diagram, where these stars can be found (and Supergiant region). There are no red giants within 5 pc of the Sun, but many of the brightest stars in the sky are red giants.

A star’s spectral class is most dependent on its color and temperature.

A star's absolute magnitude, then when you compare it to calibration stars, you can find its distance. Its distance = 10(apparent magnitude - absolute magnitude + 5)/5.

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What is the atmospheric pressure when a liquid is boiling at its normal boiling point

Answers

Answer:

The boiling point of a liquid is the temperature at which its vapor pressure is equal to the pressure of the gas above it.The normal boiling point of a liquid is the temperature at which its vapor pressure is equal to one atmosphere 760 degrees

Explanation:

Final answer:

The atmospheric pressure when a liquid is boiling at its normal boiling point equals 1 atmosphere (atm) or 101.3 kilopascals (kPa). This is the point where the vapor pressure of the liquid matches the external atmospheric pressure.

Explanation:

The atmospheric pressure when a liquid is boiling at its normal boiling point is known as 1 atmosphere (atm) or 101.3 kilopascals (kPa). The concept here revolves around the boiling point of a liquid, which is the temperature at which its equilibrium vapor pressure equals the external pressure exerted on the liquid by its gaseous surroundings. This is usually the Earth's atmospheric pressure in open containers.

Hence, when a liquid reaches its normal boiling point, the external atmospheric pressure equals 1 atm or 101.3 kPa. This means that at a liquid's normal boiling point, the vapor it produces has just enough energy to break free from the surface of the liquid without the help of further heating. For instance, the normal boiling point of water is 100 degrees Celsius, and this occurs at 1 atm of pressure.

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What statement BEST describes weathering by a glacier?
A. constructive,involves gravity
B. constructive, builds up earth
C. destructive, wears down earth
D. destructive, moves sediment one place to another

Answers

Answer:

D

Explanation:

Because is other stuff can form from sediments then why can't glaciers

To begin the experiment, 1.11g of methane CH4 is burned in a bomb
calorimeter containing 1000 grams of water. The initial temperature of water is 24.85oC. The specific heat of water is 4.184 J/g oC. The heat capacity of the calorimeter is 695 J/ oC . After the reaction the final temperature of the water is 35.65oC.

2. Calculate the change in temperature, ΔT


3. Using the formula qwater = m • c • ΔT ,calculate the heat absorbed by the water.


4. Using the formula qcal = Ccal • ΔT ,calculate the heat absorbed by the calorimeter.

5. The total heat absorbed by the water and the calorimeter can be calculated
by adding the heat calculated in steps 3 and 4. The amount of heat released
by the reaction is equal to the amount of heat absorbed with the negative
sign as this is an exothermic reaction. Using the formula ∆H = -(qcal qwater + ) ,
calculate the total heat of combustion.

6. Evaluate the information contained in this calculation and complete the
following sentence:
This calculation shows that burning ____________ grams of methane [takes
in/gives off] ______________ energy.

7. The molar mass of methane is 16.04 g/mol. Calculate the number of moles
of methane burned in the experiment.

8. What is the experimental molar heat of combustion?

9. The accepted value for the heat of combustion of methane is -890 KJ/mol.
Explain why the experimental data might differ from the theoretical value.

10.Give the formula theoretical value - experimental value % error = ×100
theoretical value , calculate
the percent error for the experiment

Answers

Answer:

2. ∆ T =  10.8 ˚C

3. q =  45,187.2 J

4. q =  7506 J

5. q (rxn) = - 52,693.2 J

6. This calculation shows that burning 1.11  grams of methane [takes  in/gives off] gives off energy.

7.  The number of moles  of methane burned in the experiment = 0.069 mol.

8. Experimental molar heat of combustion = - 761,462.4 J/mol = - 761.5 kJ/mol

9. This may be attributed to experimental error occurring like thermometers misreading , heat loses to surrounding (as the efficiency of any calorimeter doesn't reach 100 % ), and poor lab technique.

10. % Error = 14.4 %

============================================

Explanation:

Firstly, from the given information  

for water:

Initial temperature = T₁ = 24.85 °C

Final temperature = T₂ = 35.65 °C

So, the the change in temperature can be calculated

ΔT = Final temperature - Initial temperature

For calorimeter:

The heat capacity of the calorimeter is 695 J/ °C

============================================

2. ΔT = T₂ - T₁  = 35.65 °C - 24.85 °C = 10.80 °C

============================================

3. The heat absorbed by the water can be calculated from

q(water) = m • c • ΔT

where,

m =mass of water = 1000 g

C = The specific heat capacity of water = 4.184 J/g °C

So,

q(water) = m • c • ΔT = 1000 g * 4.184 J/g °C * 10.80 °C

q(water) = 45,187.2 J

============================================

4. To calculate the heat absorbed by the calorimeter,

one can use the formula

q(cal) = C(cal) • ΔT ,

Where,

C = The heat capacity of Calorimeter = 695 J/ °C

So, Using the above formula

q(cal) = C(cal) • ΔT q(cal) = 695 J/ °C * 10.8 °C = 7,506 J.

============================================

5. The total heat of combustion reaction can be calculated  using the formula

Amount of heat released by the reaction = - [Amount of heat absorbed by Calorimeter + Amount of heat absorbed by Water]

 q (rxn) = -[q(cal) + q(water)

]

∴ q (rxn) = -[7,506 J + 45,187.2 J

]  = - 52,693.2 J

That means that this is an exothermic reaction.

============================================

6. By evaluating the above information one can complete the following sentence:

This calculation shows that burning 1.11  grams of methane [takes  in/gives off] gives off energy.

============================================

7. To calculate the number of moles  of methane burned in the experiment

No. of moles = (mass / molar mass) = (1.11 g / 16.04 g/mol) =  0.069 mol

============================================

8. The experimental molar heat of combustion can be calculated from the following:

molar heat of combustion = (q (rxn) / no. ofmoles of methane)where q (rxn) is the total heat of combustion calculated in step 6, and no. of moles of methane  was calculated in step 7.

∴ Experimental molar heat of combustion = (q (rxn) / no. ofmoles of methane)

  Experimental molar heat of combustion = (-52,693.2 J / 0.069 mol)

                                                                         = - 761,462.4 J/mol

                                                                         = - 761.5 kJ/mol.

============================================

9. The accepted value for the heat of combustion of methane is -890 KJ/mol.  Explain why the experimental data might differ from the theoretical value.

This may be attributed to experimental error occurring like thermometers misreading , heat loses to surrounding (as the efficiency of any calorimeter doesn't reach 100 %),and poor lab technique.

============================================

10. Calculate the percent error for the experiment.

Given the formula below:  

% Error = [Theoretical value - Experimental value) /Theoretical value] ×100

one can Calculate the percent error for the experiment

where

Theoretical value = - 890 KJ/mol.

Theoretical value = - 761.5 KJ/mol.

% Error = [Theoretical value - Experimental value) /Theoretical value] ×100

% Error = [(-890) - (-761.5) /(-890)] ×100

= 14.4 %

============================================

A sample taken from a layer of mica in a canyon has 2.10 grams of potassium-40. A test reveals it to be 2.6 billion years old. How much potassium-40 was in the sample originally if the half-life of potassium-40 is 1.3 billion years?

Answers

Answer:

[tex]\boxed{ \text{8.40 g}}[/tex] 

Explanation:

The half-life of K-40 (1.3 billion years) is the time it takes for half of it to decay.  

After one half-life, half (50 %) of the original amount will remain.  

After a second half-life, half of that amount (25 %) will remain, and so on.  

We can construct a table as follows:  

 No. of                                 Fraction

half-lives          t/yr             Remaining  

      0               0                          1

      1                1.3  billion              ½

      2              2.6                          ¼

      3              3.9                          ⅛

We see that after 2 half-lives, ¼ of the original mass remains.

Conversely, if two half-lives have passed, the original mass must have been four times the mass we have now.

Original  mass = 4 × 2.10 g = [tex]\boxed{ \text{8.40 g}}[/tex]

Answer:

8.40 is correct

Explanation:

A container of gas is initially at 0.500 atm and 25 degrees Celsius, what will be the pressure at 125 degrees Celsius?​

Answers

0.688 would be the correct answer!

In Africa, as the crocodile lies with its mouth open, the plover, or crocodile bird, flies into its mouth and feeds on bits of meat stuck in the crocodile’s teeth. The crocodile does not harm the plover. The plover gets a meal and the crocodile gets his teeth cleaned. Describe the dynamics of this relationship.

A) It is a mutualistic relationship because both animals benefit; neither animal is harmed.
B) It is a symbiotic relationship because the plover benefits from the meat in the crocodile's teeth..
C) The crocodile is a predator. The plover is a parasite. There are two relationships illustrated by this dynamic.
D) It is an example of commensalism because the plover benefits from the relationship while the crocodile is neither helped or harmed.

Answers

NO!

Crocodiles do not eat Plovers. They only prey on larger birds like the Maribou Stork, or birds that are not quick enough to realize that they are being stalked.

So yes, A.

It is a mutualistic relationship because both animals benefit; neither animal is harmed. Therefore, the correct option is option A.

What is animal?

Any of a group of multicellular eukaryotic creatures (Kingdom Animalia). It is assumed that they developed separately from unicellular eukaryotes. Animals vary fundamentally from participants in two major kingdoms of eukaryotic organisms, plants (Plantae) and fungus (Mycota), in form and physiology.

In Africa, as the crocodile lies with its mouth open, the plover, or crocodile bird, flies into its mouth and feeds on bits of meat stuck in the crocodile’s teeth. The crocodile does not harm the plover. The plover gets a meal and the crocodile gets his teeth cleaned.  It is a mutualistic relationship because both animals benefit; neither animal is harmed.

Therefore, the correct option is option A.

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What is a chemical bond and why do atoms bond

Answers

Answer:

Explanation:

A chemical bond is a lasting attraction between atoms, ions molecules that enables the formation of chemical compound.

which of the following symbols represents half-life?

Answers

The answer is B.) T /12

Answer: [tex]t_\frac{1}{2}[/tex]

Explanation:-

1. Activation energy is the extra energy required by the reactants to cross the energy barrier and convert to products. It is designated by the symbol [tex]E_a[/tex].

2. Half life is the time taken by a reactant to reduce to its original concentration. It is designated by the symbol [tex]t_\frac{1}{2}[/tex].

3. Alpha decay: In this process, alpha particles is emitted when a heavier nuclei decays into lighter nuclei. The alpha particle released has a charge of +2 units.

[tex]_Z^A\textrm{X}\rightarrow _{Z-2}^{A-4}+_2^4\alpha[/tex]

4. Beta-decay: In this process, a neutron gets converted into a proton and an electron releasing a beta-particle. The beta particle released carries a charge of -1 units.

[tex]_Z^A\textrm{X}\rightarrow _{Z+1}^A\textrm{Y}+_{-1}^0\beta[/tex]

what was the period of time in london called because of the cold temp​

Answers

Final answer:

The period of time in London known for cold temperatures is referred to as the Little Ice Age, which spanned from 1550 AD to 1850 AD, and included the Maunder Minimum with exceptionally low temperatures in Europe.

Explanation:

The period of time in London known for its cold temperatures was the Little Ice Age, which occurred between 1550 AD and 1850 AD. The Maunder Minimum, part of the Little Ice Age, was a time of exceptionally low temperatures in Europe, specifically during the seventeenth century. Europe experienced harsh winters with the River Thames freezing and low summer temperatures led to poor harvests. The impact of the Sun's activity on Earth's climate during this period remains a topic of debate among scientists.

The notable climatic anomalies during the Maunder Minimum underscore the intricate interplay between solar activity and Earth's climate, prompting ongoing scientific discourse and investigation into the complex mechanisms influencing historical temperature variations.

Which statements best describe the first stage of cellular respiration

Answers

Cellular respiration is the process of taking in glucose (sugar) and converting it into usable energy (ATP) so therefore the first stage would be taking the glucose into your bloodstream.

Answer:

The stage ha opens I in cytoplasm, glucose is broken down, and energy is released

Explanation:

I think

A scientist is sitting in her living room and hears the wind rushing past her front door.

Based on her knowledge of Bernoulli's principle, what does the scientist know even without opening the door?

The air outside has less volume than the air inside.
There is less air pressure outside the door than inside the door.
The air outside has more mass than the air inside.
There is more air pressure outside the door than inside the door.

Answers

Answer:

Explanation:

Okay I just took this test and I will just tell you now

D is not the answer.

Sorry I couldn't be more help

Answer:

B

Explanation:

There is less air pressure outside the door than inside the door.

Calculate the mass of ammonium sulfide (NH4)2S in 3.00 L of a 0.020 M solution.

Answers

Answer:

4.09

Explanation:

Answer:

4.09

Explanation:

What happens in a nuclear reaction?

Answers

A nuclear reaction is at its most basic nothing more than a reaction process that occurs in an atomic nucleus. They typically take place when a nucleus of an atom gets smacked by either a subatomic particle (usually a "free neutron," a short-lived neutron not bound to an existing nucleus) or another nucleus

but alot of things happen to be honest to much to put down but the basic is a blast of energy that is super heated by friction that is followd by nuclear after fall and this can be very deadly even miles away

hope this helps

Final answer:

In a nuclear reaction, the nucleus of an atom undergoes a change, often transforming into a different element or isotope and releasing tremendous amounts of energy. This energy, derived from the nuclear binding energy, is much greater than energy changes in chemical reactions.

Explanation:

A nuclear reaction is a process where the nucleus of an atom changes. This change can result in the transformation of elements through a process known as transmutation or the conversion of atoms into various isotopes. Unlike chemical reactions, where electrons are transferred or shared between atoms, nuclear reactions involve changes in the nucleus and typically release far greater amounts of energy. This energy comes from the nuclear binding energy, which binds protons and neutrons in the nucleus.

Two primary types of nuclear reactions are nuclear decay reactions and nuclear transmutation reactions. In decay reactions, an unstable nucleus emits radiation to form a more stable nucleus, while transmutation reactions occur when nuclei or subatomic particles collide and transform into a different element or isotope. These processes often produce energy orders of magnitude greater than that produced by chemical reactions, highlighting the immense power of nuclear changes.

Identify the four parts of the potential energy diagram.

Answers

I think this is how to do it. but I'm sorry if it's not exactly right

Answer : The potential energy diagram is shown below.

Explanation :

Activation energy : The energy required to initiate the reaction is known as activation energy.

Or, it is the amount of energy required to reach the transition state.

Or, It is the minimum amount of energy that is absorbed by the reactant molecules so that their energy becomes equal to the threshold energy.

Or, the difference between the reactant and the transition state.

Enthalpy of a reaction : It is the energy change which takes place when the reactants go to the products. It is represented as, [tex]\Delta H[/tex]

Or, we can say that the difference between the product and the reactant.

If the heat is absorbed during the reaction then the enthalpy of reaction is positive and the reaction endothermic reaction.

If the heat is released during the reaction then the enthalpy of reaction is negative and the reaction exothermic reaction.

an object float or sink when placed on the surface of water science answer​

Answers

im not quite understanding your question but, What you place in water depends on the mass of the object and its boincy. some rocks have so much air in them they can actually float but usally all rocks sink to the bottem. Thinks like plastics, styrofoams and paper can usally float on the surface of the water.

In the gas phase, a sample of molecules will have

Answers

Answer: the answer is a fixed shape

Explanation:

Hope this helps

In the gas phase, a sample of molecules will have low density.

According to the question;

We are required to identify what a sample of molecules will have in the gas phase.

The gas phase of matter has some peculiar characteristics which include;

Ease of compression

They expand to fill the entirety of their container volume.

They occupy far more space than the liquids or solids from which they are form.

As a consequence of the properties above; Although the mass of the molecules is constant, their volume increases drastically consequently rendering the density lower.

a

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Consider the following equilibrium reaction having gaseous reactants and products.

4HCl + O2 ⇌ 2H2O + Cl2

Which of the following would result from increasing the volume of water vapors?

The volume of hydrochloric acid increases.
The rate of backward reaction decreases.
The rate of forward reaction increases.
The volume of chlorine increases.

Answers

Answer:

The volume of hydrochloric acid increases.

Explanation:

Le Châtelier's principle states that when there is an dynamic equilibrium, and this equilibrium is disturbed by an external factor, the equilibrium will be shifted in the direction that can cancel the effect of the external factor to reattain the equilibrium.

Increasing the volume of water vapors:

will increase the the concentration of the products side, so the reaction will be shifted to the left side (backward) to suppress the increase in the concentration of water vapors by addition.

So, The volume of hydrochloric acid increases, the rate of backward reaction increases, the rate of forward reaction decreases, and the volume of chlorine decreases.

So, the right choice is: The volume of hydrochloric acid increases.

Need help !!!!! ASAP

Answers

Hello!

The answer is:

We have that there were produced 0.120 moles of [tex]CO_{2}[/tex]

[tex]n=0.120mol[/tex]

Why?

We are asked to calculate the number of moles of the given gas, also, we  are given the volume, the temperature and the pressure of the gas, we can calculate the approximate volume using The Ideal Gas Law.

The Ideal Gas Law is based on Boyle's Law, Gay-Lussac's Law, Charles's Law, and Avogadro's Law, and it's described by the following equation:

[tex]PV=nRT[/tex]

Where,

P is the pressure of the gas.

V is the volume of the gas.

n is the number of moles of the gas.

T is the absolute temperature of the gas (Kelvin).

R is the ideal gas constant (to work with pressure in mmHg), which is equal to:

[tex]R=62.363\frac{mmHg.L}{mol.K}[/tex]

We must remember that the The Ideal Gas Law equation works with absolute temperatures (K), so, if we are given relative temperatures such as Celsius degrees or Fahrenheit degrees, we need to convert it to Kelvin before we proceed to work with the equation.

We can convert from Celsius degrees to Kelvin using the following formula:

[tex]Temperature(K)=Temperature(C\°) + 273K[/tex]

So, we are given the following information:

[tex]Pressure=760mmHg\\Volume=2.965L\\Temperature=25.5C\°=25.5+273K=298.5K[/tex]

Now, isolating the number of moles, and substituting the given information, we have:

[tex]PV=nRT[/tex]

[tex]n=\frac{PV}{RT}[/tex]

[tex]n=\frac{PV}{RT}[/tex]

[tex]n=\frac{760mmHg*2.965L}{62.363\frac{mmHg.L}{mol.K}*298.5K}[/tex]

[tex]n=\frac{760mmHg*2.965L}{62.363\frac{mmHg.L}{mol.K}*298.5K}\\\\n=\frac{2242mmHg.L}{18615.355\frac{mmHg.L}{mol.}}\\\\n=0.120mole[/tex]

Hence, we have that there were produced 0.120 moles of [tex]CO_{2}[/tex]

[tex]n=0.120mol[/tex]

Have a nice day!

A hypothesis is tested by ___.
A.) conducting an experiment
B.) making further observations
C.) proposing a theory
D.) talking with other scientists

Answers

A hypothesis is tested by conducting an experiment.

Answer: The correct answer would be A. Conducting Observation

Explanation:

Because....

If you don't conduct an experiment then how will you know if your hypothesis was true or not. So a hypothesis is tested by Conducting Observation.

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what is a general representation of a secondary amine?

Answers

Answer: general representation of a secondary amine is [tex]R_2NH[/tex] .

Explanation: Ammonia is [tex]NH_3[/tex] . When one or more H atoms of ammonia molecule are replaced by alkyl groups then the newly formed compounds are known as amines.

If one of the H atom from ammonia molecule is replaced by an alkyl group then we call it primary amine. It's written as [tex]RNH_2[/tex] .

If two H atoms of ammonia molecule are replaced by same or different alkyl groups then we call it secondary amine. It's written as [tex]R_2NH[/tex]  and if all the three H atoms of ammonia molecule are replaced by same or different alkyl groups then we call it tertiary amine. It is written as [tex]R_3N[/tex] .

So, the general representation of a secondary amine is [tex]R_2NH[/tex] .

A general representation of a secondary amine is R₁-N(R₂)-R₃

Organic substituents R₁ R₂ , and R₃ are hydrogen atoms that are joined to the nitrogen atom (N).

Two organic substituents (R₁ and R₂), as well as one hydrogen atom (R₃), are attached to the central nitrogen (N).

A nitrogen atom is joined to two carbon atoms and one hydrogen atom to form the secondary amine family of chemical molecules. They are referred to as "secondary" amines because the nitrogen has two organic substituents (R₁ and R₂) bonded to them. While there is three organic substituents connected to the nitrogen in tertiary amines, there is only one organic substituent attached to the nitrogen in primary amines.

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What's responsible for eutrophication in seawater

Answers

Answer:

Some of the causes of eutrophication of seawater are: high concentrations of inorganic matter, sudden changes in temperature, changes in the pH of water and the ability of some organisms to adapt to adverse conditions.

Explanation:

Eutrophication is the process through which lakes, streams, or bays become overloaded with nutrient-rich water. When this occurs, large blooms of algae are produced and when the algae die, microorganisms in the water feed on the remains and consequently use up the available oxygen in the water. This leaves little oxygen for fish and other aquatic animals, resulting in the suffocation of aquatic life. Some of the responsables are:

Presence of higher concentrations of dissolved inorganics: nitrates, phosphates and silicates and carbon. A rise in temperature, dearth of dissolved oxygen, rapid fluctuation in pH-resulting in the absence of higher trophic level consumers.Ability of certain species under some genera to withstand or adapt to adverse conditions and resultantly out-competing other in terms of dominance.

Eutrophication in seawater is primarily caused by excessive nutrient inputs, particularly nitrogen and phosphorus compounds, from human activities.

The eutrophication in seawater

These nutrients can come from various sources such as agricultural runoff, sewage discharge, industrial waste, and atmospheric deposition. Here's a breakdown of the main factors contributing to eutrophication in seawater:

Agricultural Runoff: Fertilizers containing nitrogen and phosphorus are commonly used in agricultural practices. When it rains, these nutrients can be washed off the fields and enter nearby water bodies, including the ocean.

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