Find rate of diffusion of ,,,, H2 in 5 seconds ,, is answer 5/root2

Dear Student,
The rate of diffusion of any gas is inversely proportional to the square root of molecular mass of the gas.
Therefore, 
Rate of diffusion of Hydrogen will be proportional to $\frac{1}{\sqrt{2}}$
And the amount of gas diffused in 5 seconds will be $\frac{5}{\sqrt{2}}$
​​​Regards!