please help me with chemistry heat math problem.

Question

What is the heat required to melt 77.4 g of solid diethyl ether, (C₂H₅)₂O, at its melting point? The ΔH° of fusion of diethyl ether is 7.66 kJ/mol. Use a molar mass with at least as many significant figures as the data given.

 Answer in kJ

Answer 1

77.4 g divided by 74.14 g/mol equals 1.044 mol

1.044 mol times 7.66 kJ/mol equals 7.997 kJ