# How can I calculate the molar volume of Hydrogen gas?

The actual molar volume of hydrogen can be exactly calculated from the experimental density of that gas, that is 0,0899 g/L at 0 °C (1 atm ) and 0.0837 g/L at 20 °C (1 atm), knowing that one mole of dihydrogen (${H}_{2}$) amounts to 2,0159 g/mol.