Methane effusion rate

Methane (CH4) effuses at a rate of 2.45 mol/s. What will be the effusion rate of argon (Ar) under the same conditions ... 

Section 13-1 1. Calculate the ratio of effusion rates for methane (CH4) and nitrogen. 

Problem Calculate the ratio of the effusion rates of helium and methane (CH4). 

B—Lighter gases effuse faster. The only gas among the choices that is lighter than methane is helium. To calculate the molar mass, you would begin with the molar mass of methane and divide by the rate difference squared ... 

For example, how much faster does helium effuse than methane The molar mass of helium and methane are 4 g/mol and 16 g/mol, respectively. If we insert these values into Graham s law, we find helium effuses at twice the rate of methane. 

A sample of helium gas is collected in a container with a tiny hole in it. The helium gas (M = 4 grams) effuses at a rate of 0.2 moles per minute. If a sample of methane gas (M 16 grams) is allowed to effuse under the same conditions, the rate of CH4 effusion will be... 

The correct answer is (A). There is a quick way to solve this and also a long way. The quick way is to remember that Graham s law states that the rate of effusion is inversely proportional to the square root of the molar mass. You can see pretty quickly that the molar mass of methane is 4 times that of helium. The square root of 4 is 2, meaning that helium will diffuse two times faster than methane. The longer way is to actually set up the equation — = and solve for r2. 

Methane (CH4) effuses through a small opening in the side of a container at the rate of 1.30 X 10 mol s h An unknown gas effuses through the same opening at the rate of 5.42 X 10 mol when maintained at the same temperature and pressure as the methane. Determine the molar mass of the unknown gas. 

The ratio of the relative rate of effusion of methane (CH ) to sulfur dioxide (SO2) is... 

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