Question 1: A 0.247 g sample of carbon dioxide, CO2, has a volume of 506 mL and

Question

Question 1:

A 0.247 g sample of carbon dioxide, CO2, has a volume of 506 mL and a pressure of 419 mmHg .

What is the temperature of gas in Kelvins and Celsius

Question 2:

A mixture of He, Ar, and Xe has a total pressure of 3.00 atm . The partial pressure of He is 0.350 atm , and the partial pressure of Ar is 0.350 atm . What is the partial pressure of Xe?

Express your answer to three significant figures and include the appropriate units

Question 3:

A volume of 18.0 L contains a mixture of 0.250 mole N2 , 0.250 mole O2 , and an unknown quantity of He. The temperature of the mixture is 0 C , and the total pressure is 1.00 atm . How many grams of helium are present in the gas mixture?

Express your answer to three significant figures and include the appropriate units.

-Thank you! I really appreciate your help

Explanation / Answer

m = 0.247 g of CO2

V = 506 ml

P = 419 mm Hg = 419/760 = 0.5513 atm

T = ?

PV = nRT

T = PV/(Rn)

T= 0.5513 *0.506 / (0.082*n)

n = mass/MW = 0.247/44 = 0.0056

T= 0.5513 *0.506 / (0.082*0.0056) = 607.486K

NOTE:

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