Browse Questions

# The ratio of the rate of diffusion of helium and methane under identical conditions of pressure and temperature is

$(a)\;4\qquad(b)\;2\qquad(c)\;1\qquad(d)\;0.5$

$\large\frac{Y_{He}}{Y_{CH_4}} = \sqrt{\large\frac{M_{CH_4}}{M_{He}}}$
$\;\;\;\;\;\;\;\;\;\;\;=\sqrt{\large\frac{16}{4}}$
$\;\;\;\;\;\;\;\;\;\;\;=2$