The molar mass of gas is 6.48 g/mol
Graham's law of diffusion states that the rate of diffusion of a gas is inversely proportional to the density of the gas.
The molar mass of Hydrogen gas = 2
R2/R1 = 1.8
Molar mass of gas = 2 × 1.8 × 1.8
Molar mass of gas = 6.48 g/mol
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