Determine the density of air in grams per liter at a temperature of 20.5 deg. C and a pressure of 755 mmHg?

Determine the density of air in grams per liter at a temperature of 20.5 deg. C and a pressure of 755 mmHg. Assume that air is approximately 20% O2 and 80% N2 (i.e. the mole fraction of oxygen is 0.20 and the mole fraction of nitrogen is 0.80) I need the explanation or how to on solving problem like this... show more Determine the density of air in grams per liter at a temperature of 20.5 deg. C and a pressure of 755 mmHg. Assume that air is approximately 20% O2 and 80% N2 (i.e. the mole fraction of oxygen is 0.20 and the mole fraction of nitrogen is 0.80)

I need the explanation or how to on solving problem like this please! Thank you so much! =)
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