Calculate the amount of heat transferred when 43.0g of CHn3OH(g) is decomposed by this reactio

Question

Consider the following reaction:

CH3OH(g) >>>>> CO(g) 2H2(g) Change in energy = 90.7kJ

can somebody explain the steps to this?

Answer 1

Moles CH3OH = 43.0 g / 32.04 g/mol = 1.34

90.7 kJ/mol x 1.34 mol =  121.7 kJ