Calculate (i) rms velocity and (ii) mean kinetic energy of one gram molecule of hydrogen at STP. Given density of hydrogen at STP is `0.09 kg m^(-3)`.

Explanation

To solve the problem, we will calculate (i) the root mean square (rms) velocity and (ii) the mean kinetic energy of one gram molecule of hydrogen at standard temperature and pressure (STP).

### Step 1: Calculate the RMS Velocity

The formula for the root mean square velocity \( V_{rms} \) is given by:

\[
V_{rms} = \sqrt{\frac{3P}{\rho}}
...