A 1.20 mol sample of hydrogen gas occupies 23.4L. How many mol of hydrogen are needed to fill a 101.5 L container at the same pressure and temperature?

Answer 1

The molar volume of an ideal gas is 22.4 L/mol at STP condition. However, the question provides a molar ratio which is 19.5 L/mol under whatever conditions it is in.

So, 101.5 L container will require:

101.5 L / (23.4L/1.20 mol) = 101.5 L / 19.5 L/mol = 5.21 mol // answer (taking 3 S.F.)