1) First let's calculate the molar mass of O₂ and H₂:
O₂: (16x2) = 32 g/mol (for both oxygen 1 and 2)
H₂: (1x2) = 2 g/mol
2) Now let's calculate the mass of gas sample (g) of:
Oxygen 1:
mass = mole x molar mass
mass = 1 x 32 = 32 g
Mass of Oxygen 1: 32 g
Oxygen 2:
mass = mole x molar mass
mass = 2 x 32 = 64 g
Mass of Oxygen 2: 64 g
Hydrogen:
mass = mole x molar mass
mass = 1 x 2 = 2 g
Mass of Hydrogen: 2 g
For the two oxygen samples, if the number of moles double, the mass double and the volume also double.
But the two gases of the same volume have different masses (Hydrogen 2 g and
oxygen 32 g). So there is no relationship between volume and mass for different gases.