The properties of copper conducting heat well and the sweet odor of alcohol are both physical properties. They describe the state of a physical system and do not indicate a change in the chemical composition of the substances.
Explanation:These properties you referred to are known as Physical Properties. A physical property is any property that is measurable whose value describes a state of a physical system.
The property of copper conducting heat well is a physical property. Metallic copper is highly conductive and allows for the fast transfer of thermal energy, which is a physical change, not a chemical one. It simply changes the temperature, not the chemical structure of the copper.
Similarily, the sweet odor of alcohol is also a physical property, distinct to specific alcohols, for instance, Ethanol. The odor or smell does not alter or define the chemical composition of the alcohol, thus it is not a chemical property.
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Use the drop-down menus to identify the definition of radiation and the different types of radioactive emissions.
______is the process of emitting radiant energy in the form of waves or particles.
______is two protons and two neutrons bound together into a particle identical to a helium nucleus. is a negatively charged electron emitted by the nucleus.
______is the radioactive decay of an atom that releases a photon, which results from a redistribution of electric charge within a nucleus.
Alpha particle
Beta particle
Gamma ray
Radiation
Help me quickly please! I don't get it! T.T
Explanation:
Radiation is defined as an electromagnetic energy which travels in space in the form of waves or particles.
An alpha particles is basically a helium nucleus and it contains 2 protons and 2 neutrons.
Symbol of an alpha particle is [tex]^{4}_{2}\alpha[/tex].
A beta particle is a particle with a negatively charged electron. Symbol of a beta particle is [tex]^{0}_{-1}\beta[/tex].
A gamma particle is basically a photon of electromagnetic radiation with a short wavelength.
Symbol of a gamma particle is [tex]^{0}_{0}\gamma[/tex].
Therefore, we can conclude that the definition of radiation and the different types of radioactive emissions are as follows.
Radiation is the process of emitting radiant energy in the form of waves or particles.Alpha particle is two protons and two neutrons bound together into a particle identical to a helium nucleus.Beta particle is a negatively charged electron emitted by the nucleus.Gamma ray is the radioactive decay of an atom that releases a photon, which results from a redistribution of electric charge within a nucleus." Radiation is the process of emitting radiant energy in the form of waves or particles. An alpha particle is two protons and two neutrons bound together into a particle identical to a helium nucleus. A beta particle is a negatively charged electron emitted by the nucleus. A gamma ray is the radioactive decay of an atom that releases a photon, which results from a redistribution of electric charge within a nucleus.
Radiation is a broad term that refers to the emission of energy in the form of electromagnetic waves or subatomic particles. This energy is released by atoms that are unstable, known as radioactive atoms. The process of radiation can take several forms, each with its own characteristics:
- Alpha particle: This is a type of radioactive emission that consists of two protons and two neutrons. It is the largest and most energetic of the common emissions, but because of its size, it can be stopped by a few centimeters of air or a piece of paper. Alpha particles are essentially the nucleus of a helium atom, hence why they are identical to a helium nucleus.
- Beta particle: This emission is a high-energy electron that is ejected from the nucleus of an atom during certain types of radioactive decay. Beta particles are more penetrating than alpha particles and can travel through several meters of air or a few millimeters of aluminum.
- Gamma ray: Gamma rays are high-energy photons, which are packets of electromagnetic energy. They are emitted from a nucleus during radioactive decay and are the most penetrating of the common radioactive emissions. Gamma rays can travel through several centimeters of lead or several meters of concrete, making them difficult to shield against.
Each of these types of emissions is a form of ionizing radiation, meaning they have enough energy to remove tightly bound electrons from atoms, creating ions. This can lead to damage in living tissue, which is why radiation can be harmful to biological organisms. The definitions provided in the question help to distinguish between the different types of radioactive emissions and their properties."
How many moles do 10.0 mg of CO represent?
0.28
0.036
0.000357
0.0036
For this case we have that, according to the periodic table, the atomic mass of the Carbon is [tex]12 \frac {g} {mol}[/tex] and that of the Oxygen is[tex]16 \frac {g} {mol}.[/tex]
By definition, the number of moles is given by:
[tex]n = \frac {M} {MM}[/tex]
Where:
M: It's the mass
MM: It's the molar mass
n: It is the number of moles
10 milligrams equals to 0.01 grams
[tex]n = \frac {0.01} {12 + 16} = \frac {0.01} {28} = 0.000357[/tex]
ANswer:
Option C
Answer:
0.000357 shows how many moles 10.0 of CO represent
Find out Oxidizing and Reducing agent in the following REDBOX REACTIONS.
Answer:
Fe is the reducing agent while oxygen is the oxidizing agent
Explanation:
In the reaction above Iron loses electrons to form iron ions and this is called oxidation. Therefore, iron is the reducing agent which loses electrons and becomes oxidized to form Iron(iii) ion.On the other hand, Oxygen gains or accepts electrons and therefore, it undergoes reduction. This means oxygen is the reducing agent that accepts electrons and becomes reduced to oxygen ion.A visual illustration used to show mathematical relationships is called a .
answer:
a visual illustration used to show mathematical relationships is a theory.
Answer:
Its a graph
Explanation:
4. How is photosynthesis a carbon storing process?
Carbon dioxide (CO2) in the atmosphere is necessary for plants and trees to grow. Forests play a specific and important role in the global carbon cycle by absorbingcarbon dioxide duringphotosynthesis, storing carbonabove- and belowground, and producing oxygen as a by-product of photosynthesis.
Photosynthesis is the process by which plants use sunlight to convert carbon dioxide and water into energy-storing carbohydrates and oxygen. This allows plants to store carbon in the form of glucose for growth and energy reserves, effectively removing carbon dioxide from the atmosphere.
Photosynthesis is a carbon storing process because it converts carbon dioxide from the atmosphere into energy-storing carbohydrates, such as glucose, which plants can then store for later use. The general equation for photosynthesis is:
6CO₂ + 6H₂O + light energy \rightarrow C₆H₁₂O₆ + 6O₂
During this process, solar energy is harnessed through the chloroplasts in the leaves of plants, initiating a series of reactions known as the Calvin cycle. These reactions convert atmospheric carbon dioxide and water in the presence of sunlight into glucose, which plants use to grow and thrive, or store for later energy needs. For example, sweet potatoes store carbohydrates in their roots, while aloe plants store them in their leaves, making these biological reserves an important aspect for both the plants and the ecosystems they support.
Why is it so easy for magnesium atom to lose two electrons ?
Answer: Atoms want to be like a "noble gas" with a filled outer shell. I think it has to do with being in a stable state. For Mg, it's a lot easier to drop 2 electons to look like Ne rather than gain 6 to look like Argon.
therefore ,by electric configuration we get
=2,8,2As the no. of atoms is less than 5 it is easy to lose from gaining as it took some more difficulties!!!
hope its help!!✌✌✌✌✌
SUBJECT SCIENCE...... photosynthesis changes _(chemical, light, electrical) energy into _ (chemical, potential, kinetic) energy.
Answer:
light to chemical
Explanation:
Which of the following can a cell contain?
1:) A number
2:) A word
3:) A function
4:) All of these
(my first guess was #3, just to be sure)
Answer: D. All of these
A cell contains of the options listed therefore it is D
Definitely 3 because a cell can contain many functions
These test tubes contain solutions of various colors, since they have been mixed with broth from red cabbage. The approximate pH values are noted.
How would you best describe the red or pink solutions labeled “2-4”?
How would you best describe the purple to blue solution labeled “7”?
How would you best describe the yellow-green solution labeled “11”?
Answer:
acidic
neutral
basic
Explanation:
Answer:
The answer and the explanation given below:
Explanation:
The pH is a scale which is used to identify a solution whether it is acidic, basic or neutral. The pH scale ranges from 0 to 14. A pH 7.0 is neutral which is of pure water. The range from 0.0 to 6.9 is acidic due to presence of a high concentration of hydrogen ions (H⁺) in the solution as compared to pure water. The range 7.1 to 14.0 is basic due to presence of a low concentration of hydrogen ions (H⁺) in the solution as compared to pure water.
The red or pink solutions labeled “2-4” will be acidic as per pH scale. The purple to blue solution labeled “7” will be neutral as per pH scale. The yellow-green solution labeled “11” will be basic or alkaline as per pH scale.Igneous rocks formed below earths surface
A) igneous rocks
B) extrusive
C) intrusive
D) lava
Answer:
The answer is C. Instrusive
Explanation:
The ingneas rocks are those that form when the magma cools and reaches a solid state. When this type of volcanic rock cooling occurs below the surface of the earth's crust, it is known as intrusive rocks. This type of igneous rock is formed from the magma that has solidified, creating crystals.
Igneous rocks formed below earths surface C) intrusive.
Igneous rocks are classified based on their origin and formation process. They are formed from the solidification of molten material, known as magma or lava. When magma cools and solidifies beneath the Earth's surface, it forms intrusive igneous rocks.
Intrusive igneous rocks are characterized by their formation within the Earth's crust. The magma, which is molten rock, rises to the surface and gets trapped in underground chambers called magma chambers. As the magma cools slowly over time, the minerals within it crystallize and solidify to form intrusive igneous rocks.
The slow cooling process of the magma beneath the Earth's surface allows for the growth of large mineral crystals. The resulting rocks have a coarse-grained texture due to the visible crystals. Examples of intrusive igneous rocks include granite, diorite, and gabbro.
On the other hand, extrusive igneous rocks are formed from lava that erupts onto the Earth's surface and cools quickly. The rapid cooling prevents the growth of large crystals, resulting in a fine-grained or glassy texture. Examples of extrusive igneous rocks include basalt, andesite, and obsidian.
Therefore, the correct answer is C) intrusive, as it refers to igneous rocks formed below the Earth's surface through slow cooling of magma.
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What is the pOH of 5.92x10 -2
Answer: 1.23
Explanation: Given that there is no reaction, I will assume that the molarity corresponds to that of a base.
Therefore,
All you have to do is take the negative logarithm of that molarity
Indeed, pOH = -log(5.92x10^-2) = 1.2277 = 1.23
Note:
We could also do this for the pH.
If we were finding the pH, and that we are given the molarity (also known as [OH-]), then, we would also use the negative logarithm (-log (molarity)).
If we wanted to do the opposite, we could find the molarity with the pOH using the inverse logarithm.
10^(-1.2277) = 5.92 x 10^-2
Can anyone help me out please?
Answer:
Qustion 7:
Answer is → "c. Calcium ions and sulfate ions join together to form an insoluble compound"
Question 8:
Answer is → b. ²³⁹Pa
Question 9:
Answer is → "c. 1/3 the pressure in container B"
Explanation:
=================================================================
Qustion 7:
from the graph:
a. precipitation reactions only occur when solution temperature are decreased.
this option is wrong due to precipitation reaction can occur at room temperature or even at elevated temperature.
b. Sodium ions and chloride ions repel each other when they are in a solution.
Also, this is a wrong statement because sodium ions is positively charged and attract the negatively charged chloride ions.
d. the creation of precipitate adds mass that was previously non-existent.
From graph it is clear that the mass doesn't changed before and after the reaction remain constant (=300.23 g).
So, the right answer is
→ "c. Calcium ions and sulfate ions join together to form an insoluble compound"
=================================================================
Question 8:
According to the equation :
²³⁹U → ________+ ₋₁⁰euranium(239) loses a beta particle and so the mass numer will not change ( remains 239).So, the right answer is
→ b. ²³⁹Pa
=================================================================
Question 9:
We can use the general law of ideal gas: PV = nRT.
where, P is the pressure of the gas in atm.
V is the volume of the gas in L.
n is the no. of moles of the gas in mol.
R is the general gas constant,
T is the temperature of the gas in K.
If n and T are constant, and have two different values of P and V:
Pₐ * Vₐ= P(b) *V(b)
from the graph:
Vₐ= 9.0 L.
V(b)= 3.0 L.
∴ Pₐ = [P(b) * V(b)] / Vₐ = [P(b) * 3.0 L] / 9.0 L = 1/3 P(b).
So, the right choice is:
Answer is → "c. 1/3 the pressure in container B"
=================================================================
average speed is ___.
a) a vector
b) the distance traveled divided by the time to travel that distance
c) measured in m/s
d) the slope of a velocity vs. time graph
I believe that the correct answer is choice B
PLEASE HELP!!!!!!!!Which of the following chemical reactions is best clasified as an acid-base reaction?
a
2HgO→2Hg + O2
b
Na2SO4 + BaCl2 →BaSO4 + 2NaCl
c
Zn + 2AgNO3 →Zn(NO3)2 + 2Ag
d
H2SO4 +2KOH →K2SO4 + 2H2O
Answer:
d . H₂SO₄ + 2KOH → K₂SO₄ + 2H₂O
Explanation:
The given reactions are:a . 2HgO → 2Hg + O₂,
It is a decomposition reaction, that HgO is decomposed to give Hg and O.
b . Na₂SO₄ + BaCl₂ → BaSO₄ + 2NaCl,
It is a double replacement reaction where two salts replaces their cations and anions with each others producing 2 new salts.
c . Zn + 2AgNO₃ → Zn(NO₃)₂ + 2Ag,
It is a single replacement reaction, that Zn replaces Ag from its salt.
d . H₂SO₄ + 2KOH → K₂SO₄ + 2H₂O
It is acid-base reaction "neutralization reaction" where H₂SO₄ (acid) reacts with KOH (base) producing K₂SO₄ (salt) and water.
So, the right choice is:
d . H₂SO₄ + 2KOH → K₂SO₄ + 2H₂O
Matter changes from one state to another when ____________ is added or removed.
Answer:
Heat
Explanation: When matter is heated enough, the molecules move faster and with greater energy. If enough heat is added, a solid can become liquid and a liquid can become gas. In the same way, molecules slow down when they are cooled.
thermal energy (heat) is added or removed
14C → 14N
Describe the type of radioactive emission produced from the decay of carbon-14 to nitrogen-14 and predict its reaction to an electric field.
A) Radioactive gamma decay is produced by the reaction. This neutral electromagnetic radiation are not attracted to the electric field.
B) Beta particles are released during the radioactive decay. These negative particles are attracted to the positive plate in the electric field.
C) During the radioactive decay, alpha particles are released. These positive particles are attracted to the negative plate in the electric field.
D) Both types of radioactive emissions, particles and electromagnetic radiation, are produced during this decay. None of these are attracted to the electric field.
Answer:
B.).Beta particles are released during the radioactive decay. These negative particles are attracted to the positive plate in the electric field.
Explanation:
The radioactive decay of C-14 yields a N-14 atom via the emission of Beta particles.
The Beta particles are negatively charged and would be attracted towards the positive plate in the electric field because like charges repel but unlike charges attracts one another.
Answer:
C
Explanation:
The answer is C if you're on USA test prep.
What SI unit is used to measure the number of representative particles in a substance?
Answer:
SI unit for number of representative particle is MOLE.
Explanation:
The SI unit used to measure the number of representative particles in a substance is the mole. One mole of a substance contains Avogadro's number, or 6.02×10²³ particles. This concept is critical in chemistry calculations.
Explanation:The SI (International System) unit used to measure the number of representative particles in a substance is the mole (abbreviated mol). A mole is a convenient amount unit for expressing very large numbers of atoms or molecules. Experimental measurements have determined the number of entities composing 1 mole of a substance to be 6.022 x 10²³ , a quantity called Avogadro's number.
The mole is a versatile unit that conveniently uses scientific notation to represent large values. One mole always contains 6.02×10²³ particles, independent of the element substance. This number is also known as Avogadro’s number (NA).
A mole of any substance has a mass in grams equal to its molecular mass, which can be calculated from the atomic masses given in the periodic table of elements. These concepts help scientists do computations ranging from simple unit conversions to more complex, multi-step calculations.
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All of the following are examples of synthesizing extept
Answer:
There are no examples provided here, but synthesis is when two substances combine to form one! This could be shown in an chemical equation.
Explanation:
Answer:
rephrasing and rewriting to create a term paper
Explanation:
How do you determine the number of protons in an element
Answer:
You determine the number of protons by its atomic number, just like electrons.
I am joyous to assist you anytime.
Which unit of measurement should be used for the vertical axis?
A. millimeters
B. centimeters
C. kilometers
D. decimeters
Answer:
b
Explanation:
a 49.2 g sample of solid iron was heated from 16.2c to 58.9c.what ws the energy change?solve for q(heat energy).iron has a specific heat value of .4494
Answer:
944.12 J
Explanation:
To solve for the energy change we use the equation Q=mc(Delta)t
Let's identify the variables we have:
m (mass) = 49.2 g
c (specific heat) = .4494
delta t (change in temp.) = final - initial = 58.9-16.2 = 42.7 degrees Celsius
Q= (49.2)(.4494)(42.7)
= 944.12 J
What are the concentrations of hydroxide and hydronium ions in a solution with a pH of 8.3?
Answer:
[H⁺] = 5.012 x 10⁻⁹. & [OH⁻] = 1.995 x 10⁻⁶.
Explanation:
∵ pH = - log[H⁺]
8.3 = - log[H⁺]
∴ log[H⁺] = - 8.3.
∴ [H⁺] = 5.012 x 10⁻⁹.
∵ [H⁺][OH⁻] = 10⁻¹⁴.
∴ [OH⁻] = 10⁻¹⁴/[H⁺] = 10⁻¹⁴/(5.012 x 10⁻⁹) = 1.995 x 10⁻⁶.
Answer:
The correct answer is C.
Explanation:
I just got it correct on the test. I hope this helps!
74. Which two temperatures are identical for the same substance?
(A) melting point, freezing point
B) melting point, boiling point
C) freezing point, boiling point
D) freezing point, condensation point
Answer:
(A) melting point, freezing point.
Explanation:
For the same substance: when matter is transitioning from solid to liquid (melting) or liquid to solid (freezing), its temperature is fixed at the melting/freezing point, which is the same temperature.
Answer:melting,freezing
Explanation:
What are the 7 sources of energy?
The answer is Solar, Wind, Geothermal, Hydrogen, Tidal, Wave, Hydroelectric, Biomass Energy.
Final answer:
The seven sources of energy are food, geothermal energy, tidal energy, solar energy, biomass energy, fossil fuels, and nuclear energy.
Explanation:
Sources of Energy
Food: In living organisms, the source of energy is the food they consume.
Geothermal energy: This energy comes from the earth's core.
Tidal energy: Generated by the gravitational pull of the moon and sun.
Solar energy: Produced by the sun's light and is responsible for wind, the water cycle, and photosynthesis.
Biomass energy: Created by plants, algae, and cyanobacteria utilizing solar energy through photosynthesis. Biomass can be burned for biofuels.
Fossil fuels: Formed from ancient biomass over millions of years. Includes coal, oil, and natural gas.
Nuclear energy: Generated through nuclear reactions, such as those in the sun and nuclear power plants.
hich statement is true? A. An acid with a large pKa will be a better conductor of electricity than one with a smaller pKa. B. An acid with a large pKa will be less corrosive than one with a smaller pKa. C. An acid with a large Ka will be a poorer conductor of electricity than one with a smaller Ka. D. An acid with a large Ka will be less corrosive than one with a smaller Ka. E. An acid with a large Ka will taste less sour than an acid with a smaller pKa.
Answer:
[tex]\boxed{\text{B is correct}}[/tex]
Explanation:
Kₐ and pKₐ are measures of the strength of an acid. For example,
HX + H₂O ⇌ H₃O⁺ + X⁻; Kₐ = 10¹⁰, pKₐ = -10
HA + H₂O ⇌ H₃O⁺ + A⁻; Kₐ = 10⁻¹⁰, pKₐ = 10
HX is a strong acid, because it has a larger Kₐ, that is, the position of equilibrium lies far to the right.
However, pKₐ is the negative logarithm of Kₐ, so HX has the smaller pKₐ.
Similarly, Ha is a weak acid, but it has the larger pKₐ.
Strong acid: Large Kₐ ⇔ Low pKₐ
Weak acid: Small Kₐ ⇔ High pKₐ
A is wrong. HA is a weak acid, so it produces only a few hydronium ions.
B is correct. The rate of corrosion depends on the concentration of hydronium ions. HA is a weak acid, so it is less corrosive than an acid with a small pKₐ.
C is wrong. HX is a strong acid, so there are more ions to carry the current. HX will be a good conductor of electricity.
D is wrong. HX is a strong acid, so it provides more hydronium ions and is more corrosive.
E is wrong. HX is a strong acid, so it provides more hydronium ions to stimulate the taste buds.
[tex]\boxed{\textbf{B is correct}}[/tex]
If you have 3.00 of N2, how many moles of NH3 will be produced?
Answer:
4.50
Explanation:
3.00+1.50
what are the names of the major groups that settled the islands of Oceania south
choose all answers that are correct.
A. South Americans
B. Filipinos
C. Aboriginals and Maori
D. Indonesians
Answer:
i think it's B, C and D
Explanation:
The initial temperature of a bomb calorimeter is 28.50°C. When a chemist carries out a reaction in this calorimeter, its temperature decreases to 27.45°C. If the calorimeter has a mass of 1.400 kg and a specific heat of 3.52 J/(gi°C), how much heat is absorbed by the reaction? Use . 140 J 418 J 1,470 J 5,170 J
Answer:
5,170 J.
Explanation:
The amount of heat absorbed by the reaction = the amount of heat released from the calorimeter.the amount of heat released from the calorimeter (Q) can be calculated from the relation:Q = m.c.ΔT.
where, Q is the amount of heat released from the calorimeter (Q = ??? J),
m is the mass of the calorimeter (m = 1.4 kg = 1400.0 g),
c is the specific heat capacity of the calorimeter (c = 3.52 J/g °C),
ΔT is the temperature difference (final T - initial T) (ΔT = 27.45 - 28.50 = - 1.05°C).
∵ Q = m.c.ΔT.
∴ Q = m.c.ΔT = (1400.0 g)(3.52 J/g °C)(- 1.05°C) = - 5174.0 J ≅ - 5,170 J.
∴ The amount of heat absorbed by the reaction = 5,170 J.
Answer:
When 40.0 mL of 1.00 M H2SO4 is added to 80.0 mL of 1.00 M NaOH at 20.00°C in a coffee cup calorimeter, the temperature of the aqueous solution increases to 29.20°C. If the mass of the solution is 120.0 g and the specific heat of the calorimeter and solution is 4.184 J/g • °C, how much heat is given off in the reaction? (Ignore the mass of the calorimeter in the calculation.)
Use q equals m C subscript p Delta T..
4.62 kJ
10.0 kJ
14.7 kJ
38.5 kJExplanation:
Which best describes the error in data collection
Answer:
Error (statistical error) describes the difference between a value obtained from a data collection process and the 'true' value for the population. The greater the error, the less representative the data are of the population. Data can be affected by two types of error: sampling error and non-sampling error
Explanation:.
Answer:
The correct answer is the standard deviation of the sample distribution.
Explanation:
The standard error is the standard deviation of the sample distribution of a sample statistic. The term also refers to an estimate of the standard deviation, derived from a particular sample used to compute the estimate. The larger the error, the less representative the population data. Data can be affected by two types of error: sampling error and non-sampling error.
Have a nice day!
You and your sister both have a small camping tent set up in the backyard. You each have two strings of lights to hang inside the tent. You power your lights with a 9-volt battery and your sister uses an extension cord and powers her lights from an electrical outlet on the deck.
What is the BEST conclusion the you can make about this situation?
A
Your lights shine the brightest because your battery produces less power.
B
Your lights shine the brightest because your battery produces more power.
C
Your sister's lights shine the brightest because the electrical outlet has less power.
D
Your sister's lights shine the brightest because the electrical outlet has more power.
Answer:
D
Your sister's lights shine the brightest because the electrical outlet has more power.
Explanation:
Your sister's lights shine the brightest because the electrical outlet has more power. Thus, option D is correct.
What is power?Power is the amount of energy transferred or converted per unit of time.
The intensity of lights depends on the power that is provided by the current flowing over it, therefore the intensity would increase if we raise the current.
When current is increased in a light bulb, the light bulb shines brighter and the power increases.
Thus, option D is correct.
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