Question

What volume of benzene (C6H6), d=0.88 g/mL ,molarmass = 78.11 g/mol is required to produce 1.5 x103 kJ of heat according to the following reaction?
ΔHorxn= -6278kJ
2C6H6(L) + 15 O2(g) → 12CO2(g) 6H2O(g)

so we have
density = .88 g/ mL
mass = c6 h6 78.11 g /mol
q = 1.5 x 10^3 kj
d H = -6278