2 chemistry questions?

What is the volume in L of a 9.21 g sample of oxygen gas at 40.7 degrees C that exerts 886.7 mmHg of pressure? 

A gas has a pressure of 707 mmHg at 89 °C. What is the final temperature in °C if the pressure changes to 163 mmHg?

1 Answer

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  • 4 weeks ago

    V = nRT / P = (9.21 g O2 / (31.99886 g O2/mol)) x (62.36367 L mmHg/K mol) x (40.7 + 273.15) K / (886.7 mmHg) = 6.35 L O2

    Supposing the gas does not liquify at such a low temerature:

    (89 + 273) K x (163 mmHg / 707 mmHg) = 83.46 K = −190°C

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