The rate of effusion of argon to an unknown gas is 1.194.What is the other gas?
A) oxygen
B) nitrogen
C) neon
D) krypton
E) hydrogen

Question

Quizplus · Accepted Answer

The rate of effusion is inversely proportional to the square root of the molar mass of the gas (Graham's law). Given the rate of effusion of argon to the unknown gas is 1.194, the unknown gas has a molar mass close to nitrogen (28 g/mol), which matches the calculated ratio.

The Rate of Effusion of Argon to an Unknown Gas