The average kinetic energy of 1.6 g $CH_4$ molecules at $27^{\large\circ}C$ is:

Question

$(a)\;6.21\times10^{-15}erg\qquad(b)\;6.21\times10^{-15}J\qquad(c)\;6.21\times10^{-15}Cal\qquad(d)\;\text{None of these}$