Equal volumes of an unknown gas and nitrogen () gas take 5.37 min and 3.55 minutes, respectively, to effuse through a small hole. calculate the molar mass (in g/mol) of the unknown gas.
Because the unknown gas effuses slower,we know it must have a higher molar mass
The N2 effuses 5.37 minutes / 3.55 minutes = 1.513 times faster.
1.513 = ( X / 28.01 g/mole )^0.5 where X and 28.01 are the molar masses of the unknown gas and N2 respectively.
X = 64.1 g/mole
