If the molar heat of combustion of ethane (C2H6) is -1560 kJ/mol. The heat produced when 111 g of ethane is burned is a.bc MJ.

Answer 1

I don't understand exactly what you're asking.
molar mass ethane is 30 g/mol so
-1560 kJ x 111/30 = ? kJ.
If you want MJ you divide kJ by 1000.