Answer:
Ratio of rates of effusion of He to Ne is 2.245
Explanation:
According to Graham's law rate of effusion is inversely proportional to square root of molar mass of a gas
So, [tex]\frac{r_{He}}{r_{Ne}}=\sqrt{\frac{M_{Ne}}{M_{He}}}[/tex]
where, [tex]r_{He}[/tex] and [tex]r_{Ne}[/tex] are rate of effusion of He and Ne respectively. [tex]M_{He}[/tex] and [tex]M_{Ne}[/tex] are molar mass of He and Ne respectively.
Molar mass of He = 4.003 g/mol
Molar mass of Ne = 20.18 g/mol
So, [tex]\frac{r_{He}}{r_{Ne}}=\sqrt{\frac{20.18}{4.003}}=2.245[/tex]
So, ratio of rates of effusion of He to Ne is 2.245
