What is the ratio of the average rate of effusion of CH₄(g)to that of NOF(g)at 400 K? A)49:16 B)4:7 C)16:49 D)7:4 E)The average rate of effusion is the same for the two gases.

Question

Quizplus · Accepted Answer

The rate of effusion of a gas is inversely proportional to the square root of its molar mass (Graham's law). The molar mass of CH4 is 16 g/mol and that of NOF is 49 g/mol. The ratio of the rates is the square root of (49/16), which simplifies to 7/4.

What Is the Ratio of the Average Rate of Effusion