Kinetic energy of one of an ideal gas at 300 K in kJ is

Kinetic energy per mole of an ideal gas is :

Kinetic energy per mole of an ideal gas is :

The kinetic energy of one mole gas at 300 K temperature , is E. at 400 K temperature kinetic energy is E' . The value of E'//E is

Find the kinetic energy of 2 moles of an ideal gas in calories at 27^@C