Which of the following statements are true of thermal energy and kinetic
energy?
Check all that apply.
A. All the molecules or atoms in motion have kinetic energy.
B. All the molecules or atoms in motion have thermal energy.
C. Each molecule or atom in motion has thermal energy.
D. Each molecule or atom in motion has kinetic energy.

24.25 moles of NO can be produced using 97 moles of HNO3.

Equal numbers of atoms from various elements are present in both the reactants and the products in balanced chemical equations. Varied elements' atom counts in the reactants and products of unbalanced chemical equations are different.

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

The number of moles consumed can be calculated using comparing with coefficients in the balanced reaction .

So , from above eq we get that 8 moles of HNO3 are consumed to make 2 moles of NO.

⇒  8 HNO3⇔2 NO

⇒ 1 HNO3⇔ 1/4 NO

This means that for each mole of HNO3 produces 1/4 moles of NO.

So , for 97 moles of HNO3 , [tex]\frac{1}{4} *97[/tex] moles of NO can be made,

So, total moles of NO made are 24.25 moles.

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24.25 moles of NO would be made when 97 moles of [tex]HNO_{3}[/tex] are consumed

Given reaction:

[tex]3 Cu + 8HNO_{3} - > 3 Cu(NO_{3})_{2} + 2 NO + 4 H_{2}O[/tex]

As the given reaction is already balanced so we don't need to balance it

In a balanced chemical reaction the ratio of reactants consumed and products formed always remains constant.

∵ In the given Reaction we can analyse for 8 moles [tex]HNO_{3}[/tex] consumed 2 moles of [tex]NO[/tex] are being produced.

Assuming [tex]x[/tex] moles of [tex]NO[/tex] being produced when [tex]97[/tex] moles [tex]HNO_{3[/tex] produced

∵ Ratio remains constant

⇒[tex]\frac{HNO_{3} Consumed}{NO Produced} = \frac{8}{2} =\frac{97}{x}[/tex]

⇒[tex]x=\frac{97}{4}=24.25[/tex] moles

∴ 24.25 moles of [tex]NO[/tex] would be made.

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52.66 grams of acetylene are in the tank.

PV=nRT is the formula for ideal gases, where P is the pressure and R is the constant and T is the temperature (P is 1.39 atm in this case)

Volume = 35.0 L

Gas constant = 0.08206 L.atm/K.mole

Temperature = 20.0 °C  = 293 °C

We also know that we can apply the formula ;

Number of mole(n) = [tex]\frac{MmPV}{RT}[/tex]

m = ( 26.04 × 1.39 × 35 )/ (0.08206 × 293.15)

m = 52.66 g

Thus, the mass is 52.66 grams.

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Answer: d. energy must transfer to the carbon dioxide from its surroundings.

Explanation:

Sublimation is the phase change from a solid to a gas, meaning that the particles will have more kinetic energy (since particles in the solid phase are more ordered than particles in the gas phase, and thus particles in the gas phase have more energy). Thus, for sublimation to occur, the particles need more energy, which must come from its surroundings.

Given the data, the correct statement is

Even though for a majority of the race they accelerated at the same rate, Beverly won because her initial acceleration was greater than Carl’s

This is defined as the rate of change of velocity which time. It is expressed as

a = (v – u) / t

Where

a₁ = (v – u) / t

a₁ = (15 – 0) / 10

a₁ = 1.5 m/s²

a₂ = (v – u) / t

a₂ = (35 – 15) / 40

a₂ = 0.5 m/s²

a₁ = (v – u) / t

a₁ = (10 – 0) / 10

a₁ = 1 m/s²

a₂ = (v – u) / t

a₂ = (30 – 10) / 40

a₂ = 0.5 m/s²

SUMMARY

From the above calculations, we can see that Beverly's initial acceleration is higher than that of Carl's and their final acceleration is the same.

Therefore, the correct answer to the question is:

Even though for a majority of the race they accelerated at the same rate, Beverly won because her initial acceleration was greater than Carl’s

Complete question

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Answer:

B) hope this helped.

-----------------------------

on edgy 2022

Explanation:

The weight of water produced from the complete reaction of 12.25 moles of Hydrogen is  73.5 g water

Hydrogen can be used in fuel cells to generate electricity, or power and heat.

Today, hydrogen is most commonly used in petroleum refining and fertilizer production, while transportation and utilities are emerging markets.

As according to given chemical equation,

3 moles of H₂ produces 1 mole (18 g) of water

Therefore,

The weight of water produced by 12.25 mole of hyrdogen will be ;

                                                            =  18 / 3 x 12.25 =  73.5 g water

Hence , The weight of water produced from the complete reaction of 12.25 moles of Hydrogen is  73.5 g water

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The label appears in the organic product and not in the water owing to the fact that water is eliminated as -OCH3 replaces -OH.

Isotopic labelling is one of the methods by which a chemical reaction is studied. In this case, we can see that the reaction occurs with the hemiacetal reacting with a labeled methanol.

By looking at the reaction products we can see that the label appears in the organic product and not in the water owing to the fact that water is eliminated as -OCH3 replaces -OH.

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The change in temperature of the metal is 6.1°C. Details about change in temperature can be found below.

The change in temperature of a substance can be calculated by subtracting the initial temperature of the substance from the final temperature.

According to this question, a 25.0 g sample of metal at 16.0 °C is warmed to 22.1 °C by 259J of energy.

This means that the change in temperature of the metal can be calculated as:

∆T = 22.1°C - 16°C

∆T = 6.1°C

Therefore, the change in temperature of the metal is 6.1°C.

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Answer: 6.1°C.

Explanation: just for some extra verification, the answer is indeed 6.1°C. Hope this helps and have a great day!

Answer: Crystallization is a technique which chemists use to purify solid compounds. Crystals often form in nature when liquids cool and start to harden. Certain molecules in the liquid gather together as they attempt to become stable. They do this in a uniform and repeating pattern that forms the crystal. The process is based on the principles of solubility: compounds (solutes) tend to be more soluble in hot liquids (solvents) than they are in cold liquids. If a saturated hot solution is allowed to cool, the solute is no longer soluble in the solvent and forms crystals of pure compound. Impurities are excluded from the growing crystals and the pure solid crystals can be separated from the dissolved impurities by filtration.
For an example the salt we get from seawater can have many impurities in it. Hence, the process of crystallization is in use to remove these impurities.

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   hope it helped
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As the solution cools, the solvent can no longer hold all of the solute molecules, and they begin to leave the solution and form solid crystals.

During this cooling, each solute molecule in turn approaches a growing crystal and rests on the crystal surface.

Hope this helps!!

>Rijja<

Please mark Brainliest!

Would be well appreciated :)

Explanation:

The definition of a god is an image, person or thing that is worshiped, honored or believed to be all-powerful or the creator and ruler of the universe. An example of a god is Ganesha, a Hindu diety.

Answer:

D.) 5.0 x 10⁻⁹ M

Explanation:

The formula displaying the relationship between pH and hydrogen ion concentration is:

pH = -log[H⁺]

In this formula "[H⁺]" represents the concentration of hydrogen ions (given in molarity (M)). Therefore, to find this value, you need to take the inverse of the log. The manipulation looks like this:

pH = -log[H⁺]  ------------>  [H⁺] = 10^-pH

Note that the carrot (^) represents an exponent. Now, you can plug your pH value into the equation to find the molarity.

[H⁺] = 10^-pH

[H⁺] = 10^-8.3

[H⁺] = 5.0 x 10⁻⁹ M

Avogadro's law states that in one mole of a substance, there are [tex]6.022 \times 10^{23}[/tex] molecules.

This means that in 1.55 moles, there are [tex]1.55(6.022 \times 10^{23})=\boxed{9.33 \times 10^{23} \text{( to 3 sf)}}[/tex]

Answer:

Explanation:

A solution of zinc metal and lead nitrate react to form zinc nitrate and lead metal.

Zn(s) + Pb(NO3)2 = Zn(NO3)2 + Pb

Answer: The pH of the solution is 5.65

Explanation:

The relationship between the pH and the pOH is that [tex]pH+pOH=14[/tex].

Given this, we can plug in the pOH and subtract that from 14.

[tex]14-pOH=pH\\14-8.35=5.65[/tex]

I hope this helped! Pls give brainliest!! :)

Answer:

Give the man above me brainliest

After reducing the starting volume, the gas has a resultant pressure of 3 atm.

Describe Boyle's Law.

Boyle's Law states that a gas's pressure is inversely proportionate to its volume at constant temperature:

P ∝ 1/V

The necessary equation for the posed question is:

P1V1 = P2V2, and

Initial pressure is P1 and is 1.5 atm.

Initial volume = 2 L for V1.

final pressure = P2 =?

Final volume = 1 L, or V2.

Using the aforementioned equation and all of these data, we obtain

P₂ = [tex]\frac{(1.5x2)}{1}[/tex]= 3atm

Therefore, 3 atm of pressure is needed.

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Answer:

2.0 moles S

Explanation:

To find the number of moles of S, you need to convert the moles Na to moles S via the mole-to-mole ratio. This ratio is represented by the coefficients in the balanced equation. Because you wish to find moles S, you want to put this number in the numerator. Because you want to eliminate the moles Na, this number should be in the denominator.

2 Na + 1 S ---> Na₂S

4.0 moles Na             1 mole S
----------------------  x  ---------------------  =  2.0 moles S
                                 2 moles Na

The concentration of sulphur dioxide = 0.75 mol/litre, The concentration of Oxygen is 1.125 mol/litre, The concentration of sulphur trioxide is 1.75 mol/l.

A equation in which the atoms of each element in the reactants and the products are same is called Balanced Equation .

The equation given is

2 SO₂(g) + O₂(g) 2 SO₃(g)

The initial moles of sulphur dioxide gas = 2.5 mol.

Initial Moles of Oxygen is 2 moles

The moles of sulphur dioxide gas at equilibrium is 0.75 mol

The mole ratio of sulphur dioxide to oxygen is 2:1

The mole ratio of sulphur dioxide to sulphur trioxide is 1 :1

The used up moles of sulphur dioxide is

2.5 - 0.75 = 1.75 mol

The oxygen required by 1.75 mole is 0.875 mol

The oxygen at equilibrium will be

2 -0.875

1.125 mol

The sulphur trioxide formed from 1.75 mol of sulphur dioxide at the equilibrium will be 1.75 mol.

Concentration = moles / Volume

Volume = 1L

Therefore the concentration of sulphur dioxide = 0.75 mol/litre

The concentration of Oxygen is 1.125 mol/litre

The concentration of sulphur trioxide is 1.75 mol/l.

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The alkaline permanent waves have a pH between 9.0 to 9.6.

Alkaline permanent waves are chemical that is apply to the hair. The alkaline perm makes the hair curly or wavy.

The major ingredient is the ammonium thioglycolate and ammonium hydroxide.

The alkaline permanent wave is alkaline in nature and the pH scale for alkaline substances are higher.

pH of 7 depicts neutrality while pH of 7 and above depicts alkalinity.

Therefore, alkaline permanent waves have a pH between 9.0 to 9.6.

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Answer: Decomposition

Explanation:

Decomposition reactions involve a substance breaking down into simpler substances.

The partial pressure of xenon is 571.5 KPa if the total pressure is 1436.4kPa.

The pressure exerted by a (specified) component in a mixture of gases.

According to Dalton's law of partial pressure, the net pressure of a gaseous mixture is always equal to the sum of the partial pressures of individual gases.

Now we are given that the total pressure is 1436.4kPa

The partial pressure of helium is 348.1kPa

The partial pressure of oxygen is 516.8kPa

Partial Pressure of xenon?

Using dalton's law;

1436.4kPa = 348.1kPa + 516.8kPa + partial pressure of xenon

The partial pressure of xenon is 571.5 KPa.

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Fluorite is harder than gypsum but softer than apatite. Thus, the correct option is B.

The hardness of any element may be defined as the capability of a material to oppose the process of deformation and remains in actual shape precisely.  

According to the table of hardness scales by Mohs, the increasing order of given hardness of given elements is as follows:

Gypsum < Fluorite < Apatite.

Therefore, Fluorite is harder than gypsum but softer than apatite. Thus, the correct option is B.

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The limiting reactant in the reaction is the NO molecule.

The limiting reactant is the reactant that is present in the least amount in the reaction. The rate of reaction depends on the limiting reactant.

Given the reaction; 4NH3 + 6NO --> 5N2 + 6H2O.

Number of moles of NH3 = 43.4 g/17 g/mol = 2.55 moles

Number of moles of NO = 30 g/30 g/mol = 1 mole

Now if 4 moles of NH3 reacts with 6 moles of NO

2.55 moles of NH3 reacts with 2.55 moles * 6 moles/ 4 moles

= 3.8 moles

Hence, the limiting reactant in this reaction is NO.

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The velocity of the avalanche is 0.04 miles / sec. If the avalanche lasted for 97 seconds and travels 4.5 miles,

Velocity is a vector expression of the displacement that an object or particle undergoes with respect to time .

The standard unit of velocity magnitude (also known as speed ) is the meter per second (m/s). Alternatively, the centimeter per second (cm/s) can be used to express velocity magnitude.

Given ;

Formula used ;

Velocity = Distance / Time

Therefore,

Velocity =  4.5 miles / 97 sec

              = 0.04 miles / sec

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Chemical bonds are formed when valence electrons are shared or donated.

Chemical bonds are formed between two or more atoms when electrons are transferred or shared between or among the participating atoms.

For example, ionic bonds are formed when a metal ion such as Na donates its valence electrons to a non-metallic ion such as Cl to form NaCl.

Covalent bonds are formed when participating ions shared their valence electrons to give each other octet states.

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Answer:

B. Mixing a few teaspoons of salt into the water

Explanation:

Pure water doesn't contain any ions, therefore it cannot conduct electricity. Adding salt (NaCl) to the water causes the salt to ionize into Na⁺ and Cl⁻ ions, and the movement of the ions completes the circuit, causing the bulb to glow.

Answer:

27.4 gram is the solution it's simple dude...

Explanation:

don't be afraid of huge question they confuse you you need not to be confused

now see simple solution

molality is denoted by m

so

m= moles of solute / mass of solvent in kg.

i hope your know the meaning of solute and solvent....

so moles are given 0.467

and molar mass is given 58.44

so just take out the gram means

by applying formula

58.44×0.467

it will give 27.4 grams simple.....

[tex]\huge\textbf{Hey there!}[/tex]

[tex]\huge\textbf{Better understanding of the lesson}[/tex]

[tex]\text{Formula for finding the area of rectangular prism: \boxed{\mathsf{2(wl + hl + hw) = a}}}\\\text{Whereas, \bf l = \underline{length}, w = \underline{width}, h = \underline{height.}, and a = \underline{area}}[/tex]

[tex]\huge\textbf{Now, let's solve for the given equation}[/tex]

[tex]\mathsf{a = 2\times(8\times6 + 9\times6 + 9\times8)}[/tex]

[tex]\mathsf{a = 2\times(48 + 54 + 72)}[/tex]

[tex]\mathsf{a = 2(48) + 2(54) + 2(72)}[/tex]

[tex]\mathsf{a = 96 + 108 + 144}[/tex]

[tex]\mathsf{a = 204 + 144}[/tex]

[tex]\mathsf{a = 348}[/tex]

[tex]\huge\textbf{Therefore, your answer is: \boxed{\mathsf{348\ cm^2}}}\huge\checkmark[/tex]

[tex]\huge\textbf{Good luck on your assignment \& enjoy}\\\huge\textbf{your day!}[/tex]

~[tex]\frak{Amphitrite1040:)}[/tex]

Answer: 3

Explanation:

Density is mass/volume divide the mass 9.6 by the volume of 3.2

[tex]\frac{9.6}{3.2} =3[/tex]

The density of the object displaced in water is equal to 3 g/ml.

The density of a substance can be described as the substance's mass per unit of its volume. The symbol is generally used to represent density ρ and the letter D can be used.

The mathematical formula of the density of a material can be represented as shown below:

Density = Mass/volume

ρ = m/V

The density of a material varies with pressure as well as temperature. There is a small variation in the density of the solids and liquids but much larger for gases. Increasing the pressure of the substance decreases the volume and thus increases its density.

As the object displaced water of volume of 3.2 ml.  

Therefore, the volume of the object, V = 3.2 ml

The mass of the object, m = 9.6 g

The density of the object placed in water can be calculated as:

Density of object = 9.6/3.2 = 3 g/ml

Therefore, the density of the object is 3 g/ml.

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The number of moles of gas lost is  0.0213 mol. It can be solved with the help of Ideal gas law.

According to this law, "the volume of a given amount of gas is directly proportional to the number on moles of gas, directly proportional to the temperature and inversely proportional to the pressure. i.e.

PV = nRT.

Where,

Therefore, the number of moles is

n = PV / RT

State 1 :

State 2 :

The loss in moles of gas from state 1 to state 2 is

Δn = V/R (P₁/T₁ - P₂/T₂ )

V/R = (1.75 x 10⁻³ m³)/(8.314 (N-m)/(mol-K) = 2.1049 x 10⁻⁴ (mol-m²-K)/N

p₁/T₁ = (225 x 10³)/298 = 755.0336 N/(m²-K)

p₂/T₂ = (185 x 10³)/283 = 653.7102 N/(m²-K)

Therefore,

Δn = (2.1049 x 10⁻⁴ (mol-m²-K)/N)*(755.0336 - 653.7102 N/(m²-K))

    = 0.0213 mol

Hence, The number of moles of gas lost is 0.0213 mol.

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