Benzene + Oxygen

Benzene + Oxygen ➜ Carbon Dioxide + water
2C₆H₆ + 15O₂ ➜ 12CO₂ + 6H₂O

molecular weights
C = 12
H = 1
O = 16
2C₆H₆ = 2(12•6 + 6) = 2(78) = 156 g/mol
15O₂ = 15•32 = 480
12CO₂ = 12•44 = 528
6H₂O = 6•18 = 108
check 156 + 480 = 528 + 108 = 636

156 g of C₆H₆ + 480 g of O₂ ➜ 528 g of CO₂ + 636 g of H₂O