# The relative molecular mass of methane, CH_4 is 16.043. What is the relative molecular mas of ethane, #C _6H_6? (C = 12.011)

Ethane is ${H}_{3} C - C {H}_{3}$; it has a relative molecular mass of 30.07.
And the relative molecular mass of benzene, ${C}_{6} {H}_{6}$ is $78.11$.