Balance the following the chemical equation: C2H6 + O2 → CO2 + H2O Blank 1: Blank 2: Blank 3: Blank 4:
Blank 1: 2 C2H6 + O2 → CO2 + H2O
Blank 2: 2 C2H6 + 7 O2 → CO2 + H2O
Blank 3: 2 C2H6 + 7 O2 → 4 CO2 + 6 H2O
Blank 4: 2 C2H6 + 7 O2 → 4 CO2 + 6 H2O