A container having a volume of 1.0 m3 holds 5.0 moles of helium gas at 50°C. If the helium behaves like an ideal gas, the average kinetic energy per molecule

A container having a volume of 1.0 m3 holds 5.0 moles of helium gas at 50°C. If the helium behaves like an ideal gas, the average kinetic energy per molecule is
A)6.7 × 10−20 J.
B)1.0 × 10−21 J.
C)1.0 × 10−20 J.
D)6.7 × 10−21 J.
E)1.3 × 10−20 J.