At a given temperature, gas A effuses twice as fast as gas B. If the density of gas A is 0.2 g/L, what is the density of gas B under the same conditions?

If gas X effuses twice as fast as gas Y, what is the ratio of their molar masses?

What is the ratio of diffusion rate of oxygen and hydrogen?

A certain gas takes 3 times as long effuse out as Helium. Its molecular mass will be

The root mean square speed of hydrogen molecules at room temperature is $2400\,\,{\rm{m}}{{\rm{s}}^{ - 1}}$. At room temperature the root mean square speed of oxygen molecules would be:

Equal moles of nitrogen and oxygen gases are placed in a porous container. After a certain time, one-fifth of the nitrogen has escaped. What fraction of the oxygen has escaped in the same time period?

The rate of diffusion of hydrogen gas is

Equal moles of hydrogen and oxygen gases are placed in a container with a pin-hole through which both can escape. What fraction of the oxygen escape in the time required for one-half of the hydrogen to escape?

Two gases, A and B, have molar masses of 4 g/mol and 64 g/mol respectively. If gas A effuses at a rate of 0.2 mol/s, what is the approximate effusion rate of gas B under the same conditions?

Which of the following pairs of gases would have the largest difference in their rates of effusion?

Which gas will effuse faster, oxygen ($O_2$) or hydrogen ($H_2$)?