Find the volume occupied by 3 g of hydrogen.

m / M = V / Vm.
This means: mass refers to molar mass as volume to molar volume.
m (H2) = 3 g.
M (H2) = 1 g / mol
Vm. Is a constant equal to 22.4 m ^ 3
V (H2) = 22.4 * 3 = 67.2m ^ 3



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