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In the balanced chemical equation for the formation of water, if there are 2 water molecules on the product side, how many oxygen molecules
0(
0 ext{O}_2
0)
0 are required on the reactant side?

Answer and explanation

Correct answer: One

The balanced equation for forming water is
0(
02 ext{H}_2+ ext{O}_2
ightarrow2 ext{H}_2 ext{O}
0)
0. The 2 water molecules on the product side contain 2 oxygen atoms altogether. One
0(
0 ext{O}_2
0)
0 molecule also contains 2 oxygen atoms, so 1 oxygen molecule is required on the reactant side. Using two oxygen molecules would not balance the oxygen atoms.

Related tags

ScienceClass-10Chemical-ReactionsChemical-EquationsBalancing-EquationsWater-Formation

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