Some moles of `O_(2)` diffuse through a small opening in 18 second. Same number of moles of an unknown gas diffuse through the same opening in 45 second. Molecular mass of the unknown gas is

An unknown gas 'X' diffuses four times as quickly as oxygen. The molar mass of the unknown gas is :

200 mL of SO_(2) diffuse through a porous plug in 600 seconds. What volume of methane (CH_(4)) will diffuse in the same time ?

200 mL of SO_(2) diffuse through a porous plug in 600 seconds. What volume of methane (CH_(4)) will diffuse in the same time ?

Pure O_(2) diffuses through an aperture in 224 second, whereas mixture of O_(2) and another gas containing 80% O_(2) diffuses from the same in 234 second. The molecular mass of gas will be:

An unknown gas diffuses four times as quickly as oxygen. Calculate the molar mass of the gas.

A gaseous mixture of O_(2) and an unknown gas 'X' containing 20 mole % of X diffused through a small hole in 245 seconds while O_(2) takes 220 seconds to diffuse through the same hole under similar conditions. Calculate the molecular mass of X.

350 cm^3 of CH4 and 175cm^3 of an unknown gas 'A' diffused in the same time under similar conditions. The molecular mass of gas A is