The rate of effusion of oxygen to an unknown gas is 0.935.What is the other gas? A)Ne B)Ar C)F₂ D)N₂

Question

Quizplus · Accepted Answer

The rate of effusion is inversely proportional to the square root of the molar mass. So, if the rate of effusion of oxygen to an unknown gas is 0.935, then the molar mass of the unknown gas must be 1/(0.935)^2 = 1.12 times the molar mass of oxygen. The only gas in the choices with a molar mass that is 1.12 times the molar mass of oxygen is N2.

The Rate of Effusion of Oxygen to an Unknown Gas