Pressure of an ideal gas is increased by keeping temperature constant. The kinetic energy of molecules

The average kinetic energy of a gas molecule can be determined by knowing

The $rms$ speed of an ideal hydrogen gas molecule in a gas chamber at $0^{\circ}C$ is $3180 \ m/s$. What is the pressure of the hydrogen gas in atmospheres? (Given: Density of hydrogen gas $\rho = 8.99 \times 10^{-2} \ kg/m^3$,$1 \ atm = 1.01 \times 10^5 \ N/m^2$)

The average kinetic energy of a molecule of a gas is

If the number of hydrogen molecules is twice the number of oxygen molecules at the same temperature,what is the ratio of their total kinetic energies? (Hydrogen : Oxygen)

At constant volume,the pressure of a gas is directly proportional to: