Question

In the reaction C7H16 + __O2 → 8H2O + 7CO2, what coefficient should be placed in front of O2 to balance the reaction?

Answer 1

The coefficient should be placed in front of  $O_{2}$to balance the reaction is "11".

Explanation:

The given chemical reaction:

$C_{7} H_{16}$ + ___$O_{2}$] → $8H_{2}O + 7CO_{2}$

Comparing.

C = 7 LHS = RHS

RHS =  O = 8 + 7 × 2 = 22

The the coefficient of $O_{2}$ is 11.

The coplete chemical reaction ,

$C_{7} H_{16}$ + 11$O_{2}$ → $8H_{2}O + 7CO_{2}$

Hence, the coefficient should be placed in front of  $O_{2}$to balance the reaction is "11".