During the combustion of 5.00 g of octane, C8H18, 239.5 kcal (1002 kJ) is released. How much energy (in kJ) is released by the combustion of 1.49 mol of C8H18 ?

Answer 1

molar mass C8H18 = approx 114 but you should confirm that.
grams = mols x molar mass = 1.49 mols x 114 g/mol = approx 170. Again, you need a better numb er than that estimate. Then
1002 kJ x (170 g/5.00 g) = ? kJ.

Answer 2

Thank you sooo much!!!!

Answer 3

That’s incorrect