Answer: silicate
Explanation:
Answer:
Silicates
Explanation:
About 90 percent of the earth's crust is composed from silicate class of minerals. They are the various compounds of silicon and other chemical elements. Quartz and feldspar are the two most common types of silicate types that are found in Earth’s crust. Mica and olivine, which are the lesser concentrates of silicates are also found abundantly in the earth's crust.
what is a general representation of a secondary amine?
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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which of the following symbols represents half-life?
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]
how many grams of oxygen would be needed to produce 54g of water?
107.904 grams of O2. I believe this is correct.
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
Answer:
D
Explanation:
Because is other stuff can form from sediments then why can't glaciers
What is the molarity of a solution in which 10.0g of AgNO3 is dissolved in 500. mL of solution?
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?
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
an object float or sink when placed on the surface of water science answer
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.
What happens in a nuclear reaction?
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.
which statement accurately describes the molecule Br2?
there are no choices of statements
The molecule Br2 is a diatomic molecule made up of two bromine atoms, which exists as a liquid at room temperature due to its size and number of electrons.
Explanation:The molecule Br2, which stands for Bromine molecule consists of two bromine atoms. This molecule is unique in that it is one of the few elements that exist as a liquid at room temperature.
The bromine molecule, Br2, is a simple diatomic molecule with a single, covalent bond holding the two bromine atoms together. Due to its size and number of electrons, Br2 is heavier than many other diatomic molecules, which is why it exists as a liquid at room temperature while other diatomic molecules like O2 and N2 are gases.
This specific behavior plays a significant role in understanding the trend of molecular states. For instance, Bromine's state as a liquid at room temperature, as opposed to I2 (a solid) and Cl2 (a gas) informs us about the impact of the physical state on a molecule's entropy.
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What's responsible for eutrophication in seawater
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 seawaterThese 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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The reactant atoms are copper, hydrogen, nitrogen, and oxygen. Which reactant atom was oxidized in the reaction?
Answer:
C. copper.
Explanation:
The atom which loses electrons (its oxidation sate be more positive) is the atom that is oxidized.While, the atom which gains electrons (its oxidation sate be more negative) is the atom that is reduced.Nitrogen:It is oxidation sate is changed from (+5) in the reactants (NO₃⁻) to (+4) in the products (NO₂). N gains 1 electron
So, it is reduced.
Oxygen:
It is oxidation sate is the same (-2) in the reactants (NO₃⁻) and (-2) in the products (NO₂).
So, it is neither be oxidized nor reduced.
Copper:
It is oxidation sate is changed (0) in the reactants (Cu) to (+2) in the products (Cu²⁺). Cu loses 2 electrons.
So, it is oxidized.
Hydrogen:
It is oxidation sate is the same (+1) in the reactants (H⁺) and (+1) in the products (H₂O).
So, it is neither be oxidized nor reduced.
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?
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:
when baking soda and vinegar react, the product includes bubbles. what mostly likely occurred?
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.
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?
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
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A certain reaction is endothermic in the forward direction and has a greater number of molecules on the product side. Which set of conditions should be used to maximize the yield of the products?
A. Decrease the temperature and decrease the pressure.
B. Increase the temperature and decrease the pressure.
C. Decrease the temperature and increase the pressure.
D. Increase the temperature and increase the pressure.
Answer:
[tex]\boxed{\text{ B. Increase the temperature and decrease the pressure.}}[/tex]
Explanation:
Let's say the reaction is
R ⇌ 2P; endothermic
I like to consider heat as if it were a reactant or a product in a chemical equilibrium.
Another way to write the equilibrium would be
heat + R ⇌ 2P
According to Le Châtelier's Principle, when a stress is applied to a system at equilibrium, the system will respond in a way that tends to relieve the stress.
Let's consider each of the stresses in turn.
(i) Changing the temperature
If you want to increase the amount of product, you increase the temperature. The system will try to get rid of the added heat by shifting to the right, thus forming more product.
(ii) Changing the pressure
If R and P are liquids or solids or in aqueous solution, changing the pressure will have no effect. Something must be in the gas phase for a change in pressure to affect the position of equilibrium.
If P is a gas, the equilibrium is
heat + R ⇌ 2P(g)
Then, decreasing the pressure will produce more P. If you reduce the pressure, the system will respond by shifting to the right (the side with more gas molecules) to produce more P and bring the pressure back up
Answer:
above is wrong
Explanation:
What is the difference between Arrhenius acids-base and bronsted-lowry acids bases? Justify your answer.
Answer:
A Bronsted-Lowry acid like and Arrhenius acid is a compound that breaks down to give an H+ in solution. The only difference is that the solution does not have to be water. ... An Arrhenius base is a molecule that when dissolved in water will break down to yield an OH- or hydroxide in solution.
Explanation:
explain heat transfer in your own words
Answer: thermal conductivity
Explanation:
A hypothesis is tested by ___.
A.) conducting an experiment
B.) making further observations
C.) proposing a theory
D.) talking with other scientists
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 chemical bond and why do atoms bond
Answer:
Explanation:
A chemical bond is a lasting attraction between atoms, ions molecules that enables the formation of chemical compound.
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
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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Can nonrenewable resources be used sustainably?
Answer: No
Explanation:
A non-renewable resource is the one which cannot be replenish when once used. They are expected to short out of supply because of the fact that with the increasing population worldwide the demand for the resources will also increase. As a result of this the population may face scarcity of resources in future. Such resources cannot be expected to be used sustainably as they get completely used up in a single use. For example fossil fuels like coal, petroleum and natural gas.
No, the nonrenewable resources can be used sustainably because the nonrenewable resources are the limited.
The renewable resources the resources which are naturally replenish themselves and the nonrenewable resources will not replenish. The nonrenewable resources are have limit in the supply and which cannot be used sustainably. The not all the renewable energy is the sustainable energy.
The non-renewable resources of the energy are release the harmful greenhouse gases to atmosphere, this will cause the global warming. The non-renewable sources of the energy are very harmful pollutants and will cause the habitat destruction. Therefore, the nonrenewable resources can not be used as sustainably.
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volume of carbon dioxide gas evolved at STP by heating 7.3 gram of Mg(Hco3)2 will be
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 + CO₂From 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 gNumber 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
Learn more about:
Relative Formula mass: https://brainly.com/question/5592681Moles calculation: https://brainly.com/question/5592681Molar mass: https://brainly.com/question/5592681Level: High school
Subject: Chemistry
Topic: Moles
Sub-topic: Molar gas volume
what was the period of time in london called because of the cold temp
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.
When sugar is burned, water vapor and carbon dioxide are produced.
A sugar molecule has a specific number of carbon, hydrogen, and oxygen atoms. Use the balanced chemical equation to identify the number of carbon, hydrogen, and oxygen atoms in sugar.
sugar + 12O2 → 11H2O + 12CO2
Sugar has carbon atoms.
Sugar has hydrogen atoms.
Sugar has oxygen atom
Answer;
12 carbon atoms, 22 hydrogen atoms and 11 oxygen atoms.
Explanation:
Using a balanced chemical equation we can identify the number of carbon, hydrogen, and oxygen atoms in sugar.
CxHyOn + 12O₂ → 11 H₂O + 12CO₂
When an equation is completely balanced, then the number of each atom of an element is equal on the reactant side and the product side.
Therefore;
For carbon; x = 12
For Hydrogen; y = (11×2) = 22
For Oxygen; n + (12×2) = 11 + (12×2)
= n + 24 = 11 + 24
n = 11
Therefore the sugar has, 12 carbon atoms, 22 hydrogen atoms and 11 oxygen atoms.
Thus the balanced equation would be;
C₁₂H₂₂O₁₁ + 12O₂ → 11 H₂O + 12CO₂
Answer:
122211Explanation: .
Need help !!!!! ASAP
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]
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How many moles of hydrogen, H2, are needed to react with 4.0 moles of nitrogen, N2
6 moles because you start with a balanced equation and with the balanced equation it means that regardless of how many miles of nitrogen gas you have, the reaction will always consume twice as many miles if hydrogen gas.
Identify the four parts of the potential energy diagram.
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.
What is the molarity of a solution made by dissolving 5.5 g of KI in enough water to make 150 ml of solution?
Answer:
Explanation:
molarity is moles of solute/L solution
5.5 g 1 moles Kl 1000 mL
_____ * __________ * ________ = 0.22088 M
150 ml of solution 166 grams 1 L
(39 grams K+ 127 grams I) ^
Answer:
[tex]\boxed{\text{0.22 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 KI = 5.5 g KI} \times \dfrac{\text{1 mol KI}}{\text{166.0 g KI}} = \text{0.0331 mol KI}[/tex]
2. Convert millilitres to litres
[tex]\text{V = 150 mL} \times \dfrac{\text{1 L}}{\text{1000 mL}} = \text{0.1500 L}[/tex]
3. Calculate the molar concentration
[tex]c = \dfrac{\text{0.0331 mol}}{\text{0.1500 L}} = \text{0.22 mol/L}[/tex]
The molar concentration of KI is [tex]\boxed{\textbf{0.22 mol/L}}[/tex].
Which of the following BEST describes the size of an asteroid?
Comparable to a moon
Small
Varied
Massive
I just put chemistry cuz there's no astronomy.
Answer:
Massive
Explanation: some astroids are so large they can destroy planets.
Answer:
The answer is Varied
Explanation:
Select the true statement:
Select one:
Bonds are broken and new bonds are formed during chemical reactions only.
Bonds are broken and new bonds are formed during both chemical reactions and physical changes.
Bonds are broken and new bonds are formed during physical changes only.
Bonds do not change in either chemical reactions or physical changes.
Answer:
Bonds are broken and new bonds are formed during chemical reactions only.
Explanation:
A physical change in a substance doesn't change what the substance is.In a chemical change where there is a chemical reaction, a new substance is formed and energy is either given off or absorbed. Physical changes can be reversed, chemical changes cannot be reversed with the substance changed back without extraordinary means, if at all. For example, a cup of water can be frozen when cooled and then can be returned to a liquid form when heated.So, the right choice is:
Bonds are broken and new bonds are formed during chemical reactions only.
Final answer:
Bonds are broken and new bonds are formed during chemical reactions only, not during physical changes. A chemical reaction reorganizes atoms into new substances, which involves breaking old bonds and forming new ones, fundamentally changing the composition of the reactants.
Explanation:
The true statement is that bonds are broken and new bonds are formed during chemical reactions only. During a chemical reaction, reactants undergo a transformation where their chemical bonds are broken, atoms are rearranged, and new substances with new bonds are formed, called products. This process involves energy changes, where breaking bonds requires an input of energy while forming bonds releases energy.
Conversely, physical changes involve a change in the form or physical properties of a substance, without altering the chemical composition or the bonds within molecules. Thus during chemical reactions, old bonds are broken, and new bonds form to create new substances with different chemical and physical properties; this is essential in defining a chemical change. Physical changes, on the other hand, do not involve changes in the bonds that hold atoms together within a molecule.