Please help me on this one. Thanks

Explanation:

Look here,

2H2 + O2. --> 2H2O

On,

LHS = 2 × H2 = 4H atoms and 2O atoms

RHS = 2 × H2 = 4H atoms and 2 × O = 2O atoms

Hence,

LHS = RHS and above equation is balanced.

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i think that the answer is c