What is the mass of a sample of O2 gas, which has a pressure of 740 mmhg at a temperature of 25 degrees Celsius in a volume of 250 mL

Question

Chemistry

Katelynn Sawyer

26 June, 12:54

What is the mass of a sample of O2 gas, which has a pressure of 740 mmhg at a temperature of 25 degrees Celsius in a volume of 250 mL

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Answers (1)

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Glenn · Answer 1

0.32 g O2

Explanation:

740 mmHg = 0.97 atm

25°C=298 K

250 mL=0.25 L

PV=nRT

n = PV/RT

n = (0.97 atm*0.25L) / (0.0821 * 298K)

n=9.91 x 10^-3 mol O2

1 mol O2 - > 32 g

9.91 x 10^-3 mol O2 - > x x = 0.32 g O2