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3 years ago

What is the average kinetic energy of 1 mole of gas at 0 degrees kelvin

1 answer:

7 0

The average kinetic energy of a mole of substance is determined from the formula, E=1.5RT where R is 8.314 J/mol K. Substituting temperature of zero kelvin to the equation, the energy is zero. It is recalled that at zero kelvin or absolute zero temperature, all molecules are not moving.

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How many moles of N are in .235g of N2O

makkiz [27]

Given the molar mass of Nitrogen is 14.01g/mol you can use that to solve for the moles of nitrogen.
0.235g(1mol/14.01g) = .0168 moles.

6 0

3 years ago

Calculate the freezing point (in degrees C) of a solution made by dissolving 7.99 g of anthracene{C14H10} in 79 g of benzene. Th

mario62 [17]

Answer: The freezing point of solution is 2.6°C

Explanation:

To calculate the depression in freezing point, we use the equation:

$\Delta T_f=iK_fm$

Or,

$\Delta T_f=i\times K_f\times \frac{m_{solute}\times 1000}{M_{solute}\times W_{solvent}\text{ in grams}}$

where,

$\Delta T_f$ = $\text{Freezing point of pure solution}-\text{Freezing point of solution}$

Freezing point of pure solution = 5.5°C

i = Vant hoff factor = 1 (For non-electrolytes)

$K_f$ = molal freezing point depression constant = 5.12 K/m = 5.12 °C/m

$m_{solute}$ = Given mass of solute (anthracene) = 7.99 g

$M_{solute}$ = Molar mass of solute (anthracene) = 178.23 g/mol

$W_{solvent}$ = Mass of solvent (benzene) = 79 g

Putting values in above equation, we get:

$5.5-\text{Freezing point of solution}=1\times 5.12^oC/m\times \frac{7.99\times 1000}{178.23g/mol\times 79}\\\\\text{Freezing point of solution}=2.6^oC$

Hence, the freezing point of solution is 2.6°C

8 0

3 years ago

What of the following is a Cation? A) (SO3)^-2 B) sulfate C) (Ca)^+2 D) chloride

Agata [3.3K]

Answer:c

Explanation:

I think because ca^+2

It’s loses the ion and if u look back u would see that a cation is a t charge but it’s not Goan that electron it’s losing that electron

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3 years ago

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frosja888 [35]

Answer: it’s climate

Explanation:

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2 years ago

Which reactants would lead to a spontaneous reaction?

Igoryamba

Answer:

B. Ba2+ and Mn (nevermind its not B)

Explanation:

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3 years ago