How many moles are in 68.5 liters of oxygen gas at STP?

1 Answer
Apr 8, 2016

It is a given that the molar volume of an ideal gas at STP is 22.414 L*mol^-1. This would probably even appear on a test paper as supplementary info.

Explanation:

So to get the molar quantity, we simply divide the actual volume by the molar volume:

(68.5*cancelL)/(22.414*cancelL*mol^-1) = "approx. "3*mol.