Which of the following best describes the kinetic theory?
A. Energy is conserved when converted to another type of energy.
B. Atoms and molecules are always moving or vibrating.
C. Electron pairs move apart to form more stable molecules.
D. Atoms rearrange in molecules to form new compounds.

Answer:

The number of

atoms in the unit cell is 2

Explanation:

Answer:

The answer is C.

Explanation:

i got a 100 on the test

The theoretical yield of carbon dioxide, CO₂ obtained from the reaction is 8.93 g

We'll begin by calculating the mass of citric acid, H₃C₆H₅O₇ that reacted and the mass of carbon dioxide, CO₂ produced from the balanced equation.

H₃C₆H₅O₇ + 3NaHCO₃ —> 3CO₂ + 3H₂O + Na₃C₆H₅O₇

Molar mass of H₃C₆H₅O₇ = (3×1) + (12×6) + (5×1) + (7×16) = 192 g/mol

Mass of H₃C₆H₅O₇ from the balanced equation = 1 × 192 = 192 g

Molar mass of CO₂ = 12 + (2 × 16) = 44 g/mol

Mass of CO₂ from the balanced equation = 3 × 44 = 132 g

From the balanced equation above,

192 g of H₃C₆H₅O₇ reacted to produce 132 g of CO₂

Finally, we shall determine the theoretical yield of CO₂. This can be obtained as follow:

From the balanced equation above,

192 g of H₃C₆H₅O₇ reacted to produce 132 g of CO₂.

Therefore,

13 g of H₃C₆H₅O₇ will react to produce = (13 × 132) / 192 = 8.93 g of CO₂.

Thus, the theoretical yield of CO₂ is 8.93 g

Learn more about stoichiometry: https://brainly.com/question/25910524

Answer:

Positive

Explanation:

The nucleus of an atom has a net positive charge  which is balanced by the negative charge of the electrons residing in the orbital of an atom. The reason why the nucleus of an atom is positively charged is because it contains two sub atomic particles;

The protons and neutrons. In terms of charge, the proton is positively charged and the neutron is neutral. This means the neutron does not partake in the charge of the nucleus. Hence the net charge of the nucleus is decided by the protons which are positively charged

Answer:

15) the mass of an electron is really small and uncountable while that of proton is bigger and countable

The following units indicate these quantities:

1.  mL- Volume

2. cm^2- Area

3. mm^3- volume

4. mg/L- Concentration

5. ps- Time

6. nm- Length

7. K- Temprature

- mL: This unit indicates volume, specifically the volume of liquid or fluid in milliliters.

- cm^2: This unit indicates area, specifically the area of a two-dimensional object in square centimeters.

- mm^3: This unit indicates volume, specifically the volume of a three-dimensional object in cubic millimeters.

- mg/L: This unit indicates concentration, specifically the concentration of a substance in milligrams per liter of solution.

- ps: This unit indicates time, specifically time measured in picoseconds (one trillionth of a second).

- nm: This unit indicates length, specifically the length of an object in nanometers (one billionth of a meter).

- K: This unit indicates temperature, specifically temperature measured in kelvins, which is a unit of temperature that starts at absolute zero (the coldest possible temperature).

To know more about Units:

https://brainly.com/question/11071210

#SPJ11

The specific measurement that will be affected is the volume of gas collected in the graduated cylinder. Since not all the gas was caught, the volume measured will be less than the actual volume of gas released. This will not change the molar mass calculation.

The molar mass is calculated by using the mass of the gas and the volume of the gas collected. Even though the volume measured was less than the actual volume, the mass of the gas collected should still be accurate. Therefore, the molar mass calculation should not be affected.
Hi! I'm happy to help with your question.

a. The specific measurement that will be affected is the volume of gas collected in the graduated cylinder.

b. This mistake will likely result in a decrease in the calculated molar mass. Since the volume of gas collected is lower than it should be, the molar mass calculation will be based on a smaller amount of gas, leading to a lower value than the actual molar mass.

To know more about molar mass calculation.  click here:

brainly.in/question/15629812

#SPJ11

Answer:

N3-

Explanation:

Answer:

no

Explanation:

it means melting or fusion so yhe answer is no

A substance changes from a solid to a liquid no its is not the formation of new substance. It is the change of state of the matter.

The states of matter can be defined as one of the several configurations in which matter can exist.

There are basically three states of matter.

Thus, a  substance changes from a solid to a liquid no its is not the formation of new substance. It is the change of state of the matter.

To learn more about states of matter, refer to the link below:

https://brainly.com/question/9402776

#SPJ2

Answer:

Please make me brainalist and keep smiling dude I hope you will be satisfied with my answer is updated

Explanation:

Down a group, the number of energy levels (n) increases, so there is a greater distance between the nucleus and the outermost orbital. This results in a larger atomic radius.

Since the exact values of the service times are not provided, it is not possible to calculate the 3-sigma control limits. Therefore, the correct answer is "None of the other options."

The 3-sigma control limits are used in statistical process control to determine the acceptable range of variation in a process. To calculate the 3-sigma control limits, we need to first find the mean and standard deviation of the service times for the 20 randomly selected customers.

Step 1: Find the mean (average) of the service times.
Add up all the service times and divide by the total number of customers (20).

Step 2: Find the standard deviation of the service times.
Calculate the difference between each service time and the mean, square each difference, sum up all the squared differences, divide by the total number of customers (20), and then take the square root of the result.

Step 3: Calculate the 3-sigma control limits.
Multiply the standard deviation by 3 and add/subtract the result to/from the mean. This will give you the upper and lower control limits.

Since the exact values of the service times are not provided, it is not possible to calculate the 3-sigma control limits. Therefore, the correct answer is "None of the other options."

Learn more about 3-sigma control limits from given link: https://brainly.com/question/17063477

#SPJ11

A solution at pH 1 has more hydrogen ions than a solution at pH 4. The pH of a solution refers to the hydrogen ion concentration.

The concentration of hydrogen ions and the pH of a solution are inversely proportional. This means that the higher the hydrogen ion concentration, the lower the pH, and vice versa.

A solution at pH 1 will have more hydrogen ions than a solution at pH 4.The pH of a solution is defined as the negative logarithm of the hydrogen ion concentration. The equation for calculating the pH of a solution is given as follows:

\($$pH = -\log_{10}[H^+]$$\)

In this equation, [H⁺] is the hydrogen ion concentration in moles per liter (mol/L) of solution. A change of 1 pH unit corresponds to a 10-fold change in the hydrogen ion concentration.

Therefore, if a solution has a pH of 1, it has a hydrogen ion concentration of 0.1 mol/L.

If a solution has a pH of 4, it has a hydrogen ion concentration of 0.0001 mol/L. Thus, a solution at pH 1 has more hydrogen ions than a solution at pH 4.

To know more about pH, refer

https://brainly.com/question/15265711

#SPJ11

Increase and decrease in pressure

Explanation:

The factors that cause transitions between the solid and liquid state are:

1. The increase in pressure of most liquids can lead to the transition to the solid phase. This is because, in general, an increase in pressure promotes the formation of a denser phase, which is the solid state in this case.

2. The decrease in pressure of most liquids can lead to the transition to the solid phase. This is not as common, but certain substances may undergo this transition.

To know more about States of Matter:

https://brainly.com/question/9402776?

#SPJ11

To "fix" hydrogen means to convert it from its gaseous form (H₂) into a chemically usable form or compound.

Fritz Haber's method for fixing hydrogen, known as the Haber-Bosch process, involves combining hydrogen (H₂) with nitrogen (N₂) from the air to produce ammonia (NH₃) through a catalytic reaction. This ammonia can then be used to produce fertilizers, explosives, and other important chemicals.

Fritz Haber's method is considered the most important invention of the twentieth century because it revolutionized agriculture and food production. The production of ammonia-based fertilizers made it possible to significantly increase crop yields, addressing global food shortages and supporting a growing population.

This process had a profound impact on global agriculture and played a crucial role in the Green Revolution, which helped alleviate hunger and improved living standards worldwide.

Additionally, the Haber-Bosch process also enabled the production of synthetic materials, such as plastics and fibers, that have transformed various industries and contributed to technological advancements.

To know more about the Fritz Haber's method refer here :

https://brainly.com/question/22369623#

#SPJ11

Answer:

4.30 × 10²⁰ atoms

Explanation:

You need to find out how many moles you have.  First, convert milligrams to grams.

62.5 mg × (1 g)/(1000 mg) = 0.0625 g

Next, use the molar mass to convert from grams to moles.

0.0625 g ÷ 87.62 g/mol = 7.13 × 10⁻⁴ mol

To convert from moles to atoms, you need to use Avogadro's number (6.022 × 10²³).  Avogadro's number is the number of atoms in a mole.

7.13 × 10⁻⁴ mol × 6.022 × 10²³ atoms/mol = 4.296 × 10²⁰ ≈ 4.30 × 10²⁰ atoms

You will have 4.30 × 10²⁰ atoms of strontium.

The number of Strontium atoms are 4.30 × 10²⁰ atoms

Given:

Mass of Strontium = 62.5 mg × (1 g)/(1000 mg) = 0.0625 g

Molar mass of Strontium = 87.62 g/mol

To find:

Moles of Strontium = ?

It is defined as given mass over molar mass.

\(\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}\\\\\text{Number of moles}=\frac{0.0625 g}{87.62 g/mol }\\\\\text{Number of moles}=7.13 * 10^{-4} mol\)

Avogadro's number is the number of atoms in a mole (6.022 * 10²³)

Conversion of moles into atoms:

\(7.13 × 10^{-4} mol * 6.022 * 10^{23} atoms/mol \\\\\text{ Sr atoms}= 4.296 * 10^{20} = 4.30 * 10^{20} atoms\)

Thus, Strontium atoms will be 4.30 × 10²⁰ atoms.

Find more information about Number of moles here:

brainly.com/question/15356425

Answer:

Very sweet tea

Explanation:

yeah... because sweet tea can cause tooth decay in our mouth thats why...(Please check the other answers also...Its all my point of view....thank you)

The concentration of particles is also determined by particle size, with smaller particles having a higher concentration than larger particles at the same filtration rate.

The effect of filtration rate on filter performance for particles with diameters of 0.1,1.0, and 10μm using the TE filtration model is a monodisperse media of 0.5 mm diameter, porosity 0.42, particle density 1020 kg/m3, filter depth 1 m, temperature 20 ∘C, Hamaker constant Ha=10−20 J, and attachment efficiency 1.0 is assumed here.

The results of the plot are commentary on the effect of filtration rate and particle size on filter performance. The graph indicates that as the filtration rate increases, the concentration of the particle decreases. Therefore, the filter performance improves as the filtration rate increases.

As the particle diameter increases, the filtration rate and particle concentration decrease. Consequently, the filter performance declines as the particle size increases. As a result, particle size and filtration rate significantly influence filter performance.

Learn more about filtration -

brainly.com/question/29756050

#SPJ11

Answer:

Explanation:

Question 1:

The balanced chemical equation is:

2 NH3 + 3 CuO → 3 Cu + N2 + 3 H2O

The molar ratio between CuO and N2 is 3:1, which means that for every 3 moles of CuO consumed, 1 mole of N2 is produced.

To find how many grams of N2 can be produced from 5.3 moles of CuO, we need to first calculate how many moles of N2 can be produced:

Moles of CuO = 5.3 mol CuO

Moles of N2 = Moles of CuO / 3 (from the molar ratio)

Moles of N2 = 5.3 mol CuO / 3 = 1.77 mol N2

Now we can use the molar mass of N2 to calculate the mass:

Molar mass of N2 = 14 g/mol

Mass of N2 = Moles of N2 x Molar mass of N2

Mass of N2 = 1.77 mol x 14 g/mol = 24.78 g

Rounded to the nearest tenth, the answer is 24.8 g of N2.

Therefore, 24.8 grams of N2 can be made when 5.3 moles of CuO are consumed.

Question 2:

The balanced chemical equation is:

S + 6 HNO3 → H2SO4 + 6 NO2 + 2 H2O

The molar ratio between HNO3 and H2O is 6:2, which means that for every 6 moles of HNO3 consumed, 2 moles of H2O are produced.

To find how many grams of H2O can be produced from 19.5 moles of HNO3, we need to first calculate how many moles of H2O can be produced:

Moles of HNO3 = 19.5 mol HNO3

Moles of H2O = Moles of HNO3 x 2/6 (from the molar ratio)

Moles of H2O = 19.5 mol HNO3 x 2/6 = 6.5 mol H2O

Now we can use the molar mass of H2O to calculate the mass:

Molar mass of H2O = 18 g/mol

Mass of H2O = Moles of H2O x Molar mass of H2O

Mass of H2O = 6.5 mol x 18 g/mol = 117 g

Rounded to the nearest tenth, the answer is 117.0 g of H2O.

Therefore, 117.0 grams of H2O can be made when 19.5 moles of HNO3 are consumed.

Question 3:

The balanced chemical equation is:

3 Cu + 8HNO3 → 3 Cu(NO3)2 + 2 NO + 4 H2O

The molar ratio between HNO3 and H2O is 8:4, which means that for every 8 moles of HNO3 consumed, 4 moles of H2O are produced.

To find how many grams of H2O can be produced from 15.4 moles of HNO3, we need to first calculate how many moles of H2O can be produced:

Moles of HNO3 = 15.4 mol HNO3

Moles of H2O = Moles of HNO3 x 4/8 (from the molar ratio)

Moles of H2O = 15.4 mol

Movement of the axon membrane potential from -70 mv to -90 mv would be termed hyperpolarization.

The word "hyperpolarization" is used to describe a procedure or action that makes a cell's membrane potential more negative than it usually is. When the plasma membrane is polarized, electrical charges of both the positive and negative types are present.

A cell, more precisely a neuron, has a negative membrane potential in relation to its surroundings. Because there are more negative ions (like Cl-) inside the cell, the cell may maintain a moderately negative electrical charge. A neuron's resting potential would typically be about -70 mV.

To view more about axon membrane, refer to:

https://brainly.com/question/27302751

#SPJ4

Answer:

whatttttttttttttr//ttttt

TNT (Trinitrotoluene) has relatively small energy per pound, but it is a very effective explosive due to the following reasons:

1. It is an insensitive explosive: TNT has a high ignition temperature, making it less prone to accidental detonation. TNT can also resist shock and friction, making it a stable explosive.

2. High detonation velocity: TNT is capable of detonating at a speed of 6,900 m/s. This high velocity allows TNT to produce a supersonic shockwave that can cause significant damage to its surroundings.

3. High gas yield: When TNT explodes, it produces a large amount of gases, which further increases the pressure exerted on its surroundings. This high-pressure shockwave causes significant damage to buildings and structures.

4. Easy to manufacture: TNT is relatively easy and cheap to manufacture, making it a popular explosive for military and industrial applications.

To know more about ignition temperature, visit:

https://brainly.com/question/31030276

#SPJ11

Answer: I belive it is 25%. Correct me if you know the answer or think I am wrong.

Explanation:

Answer: right answerq

Explanation: Positive feedback occurs to increase the change or output

Answer:

Air

Explanation:

Air is an homogeneous mixture because it contain gaseous samples that have the same proportion throughout it's given sample. Air is a mixture of gaseous substances of 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.04% carbon dioxide, 1% of water vapor and small amounts of other gases in same proportion.

Explanation: You know that the mass of an individual lead atom is equal to

3.4

⋅

10

−

22

grams.

A substance's density tells you what its mass per unit of volume is. In this case, you know that lead has a density of

11.3 g/cm

3

, which means that each

cm

3

of lead will have a mass of

11.3 g

.

Now, your cube has a volume of

2.00 cm

3

, which means that its mass will be equal to

2.00

cm

3

⋅

density



11.3 g

1

cm

3

=

22.6 g

Now all you have to do is look at the mass of one lead atom and figure out exactly how many lead atoms would be needed to make the total mass of the cube equal to

22.6 g

.

22.6

g

⋅

the mass per atom



1 lead atom

3.4

⋅

10

−

22

g

=

6.647

⋅

10

22

lead atoms

Rounded to two sig figs, the number of sig figs you have for the mass of an individual lead atom, the answer will be

no. of lead atoms

=

6.6

⋅

10

22

atoms

You can double-check this result by using lead's molar mass, which tells you what the exact mass of one mole of lead is.

22.6

g

⋅

1 mole Pb

207.2

g

=

0.1091 moles Pb

Now use Avogadro's number to determine how many atoms of lead you have in that many moles

0.1091

moles

⋅

6.022

⋅

10

23

atoms

1

mole

=

6.57

⋅

10

22

atoms

To two sig figs, you will once again get

no. of lead atoms

=

Answer:

23.48

Explanation:

Good Luck!

Answer: 23.48 g

Explanation:

formula: mass = density x volume

Volume of copper = 2.62 cm^3

Density of copper = 8.96 g/cm^3

mass = 8.96 x 2.62 = 23.4752

Answer:

The feedback loop involving water vapor and temperature is a positive feedback loop. As temperature increases, the amount of water vapor that can be held in the atmosphere also increases. This leads to an increase in the amount of water vapor in the atmosphere, which further amplifies the greenhouse effect and contributes to additional warming.

In other words, warmer temperatures lead to more water vapor in the atmosphere, which traps more heat, causing further warming, and so on. This positive feedback loop can amplify the initial warming effect caused by other factors such as greenhouse gas emissions or changes in solar radiation.

Conversely, if the temperature decreases, the amount of water vapor that can be held in the atmosphere decreases, which can lead to a decrease in the amount of water vapor present in the atmosphere, reducing the greenhouse effect and contributing to cooling. However, this negative feedback loop is weaker than the positive feedback loop described above, and it tends to be dominated by the positive feedback loop under most circumstances.

After 241.84 years, only about 3.2% of the original amount of Cs-137 remains undecayed. Proper management and disposal of nuclear waste products are crucial to prevent harm to the environment and human health.

Cesium-137 (Cs-137) is a radioactive isotope that is produced as a fission product in nuclear reactors. It has a half-life of about 30 years, which means that after each 30-year period, half of the Cs-137 will decay into a stable element. Therefore, to determine the fraction of Cs-137 that remains undecayed after 241.84 years, we can use the following formula:

Fraction remaining = \(\left(\frac{1}{2}\right)^{\frac{t}{h}}\)

where t is the time elapsed and h is the half-life of Cs-137.

In this case, t is 241.84 years and h is 30 years, so we can substitute these values into the formula and calculate the fraction remaining:

Fraction remaining = \(\left(\frac{1}{2}\right)^{\frac{241.84}{30}}\)

Fraction remaining ≈ 0.032

Therefore, after 241.84 years, only about 3.2% of the original amount of Cs-137 remains undecayed. The remaining 96.8% has decayed into stable isotopes. This highlights the importance of properly managing and disposing of nuclear waste products to avoid potential harm to the environment and human health.

To learn more about nuclear

https://brainly.com/question/18187269

#SPJ4

Molecular compounds are a type of compound in which the atoms are bound together by covalent bonds. The atoms within a molecule share electrons with each other, creating a stable structure.

Molecular compounds are usually made up of non-metal elements, although there are a few exceptions such as water. Examples of molecular compounds include carbon dioxide, methane, and ammonia. These compounds tend to have low melting and boiling points, and are usually found in gaseous or liquid form.

Non-molecular compounds, on the other hand, are compounds in which the atoms are held together by ionic or metallic bonds. This means that electrons are transferred between the atoms, creating a charged structure. Non-molecular compounds are typically made up of a metal and a non-metal element, although there are some exceptions. Examples of non-molecular compounds include table salt (sodium chloride) and calcium carbonate. These compounds tend to have high melting and boiling points, and are usually found in solid form.

Non-molecular compounds are usually more stable than molecular compounds due to the strength of their bonds. Additionally, non-molecular compounds tend to have higher melting and boiling points because they require more energy to break their strong ionic or metallic bonds. In contrast, molecular compounds usually have lower melting and boiling points due to their weak intermolecular forces.

To learn more about Molecular visit;

https://brainly.com/question/156574

#SPJ11