Question

Propane burns in oxygen to produce carbon dioxide and steam. The unbalanced equation for this reaction is: C3H8 + O2 → CO2 + H2O

Answer 1

Here is your answer

C3H8 + O2-----> CO2 + H2O

Balancing C atoms

C3H8 + O2------> 3CO2 + H2O

Balancing H atoms

C3H8 + O2------> 3CO2 + 4H2O

Balancing O atoms

C3H8 +$\bold{5}$O2-------> $\bold{3}$CO2 + $\bold{4}$H2O

Hence the equation is balanced.

HOPE IT IS USEFUL