Question

Which chemical equation is balanced?
A. H2 + O2 --> H2O
B. H2 + O2 --> 2H2O
C. 2H2 + O2 --> 2H2O
D. 2H2 + 2O2 --> 2H2O

Answer 1

C. 2H2 + O2 --> 2H2O

4H 2O -----> 4H 2O

Numbers atoms of the H and O are the same before and after reaction.

Answer 2

Answer : The correct option is, (C)

Explanation :

Balanced chemical reaction : It is defined as the reaction in which the number of atoms of individual elements present on reactant side must be equal to the product side.

The balanced chemical reaction will be:

$2H_2+O_2\rightarrow 2H_2O$

By the stoichiometry we can say that, 2 moles of hydrogen gas react with 1 moles of oxygen gas to give 2 moles of water as a product.

Hence, the correct balanced chemical reaction will be:

$2H_2+O_2\rightarrow 2H_2O$