if the rate of effusion of a particular gas was measured and found to be 25.9 mL/min. the rate of effusion of pure methane (CH 4 ) gas is 46.8…

if the rate of effusion of a particular gas was measured and found to be 25.9 mL/min. the rate of effusion of pure methane (CH4) gas is 46.8 mL/min. Find the molar mass of the unknown gas. step by step please