Pentane gas (C 5 H 12 ) combusts with oxygen gas (O 2 ) to form water (H 2 O) and carbon dioxide (CO 2 ).

1.    Pentane gas (C5H12) combusts with oxygen gas (O2) to form water (H2O) and carbon dioxide (CO2). Write a balanced chemical equation for this reaction and explain the scientific principle (statement) that requires the balancing of an equation to make it conform to reality.