Which best represents a balanced equation? A. HgO Hg + O2 B. 2Fe + O2 Fe2O3 C. 2H2 + O2 2H2O
Question
Which best represents a balanced equation? A. HgO Hg + O2 B. 2Fe + O2 Fe2O3 C. 2H2 + O2 2H2O
Solution
The balanced equation among the options given is C. 2H2 + O2 2H2O.
Here's why:
A balanced chemical equation occurs when the number of the different atoms of elements in the reactants side is equal to that of the products side.
A. HgO Hg + O2 is not balanced because there are 2 oxygen atoms on the product side while there is only 1 on the reactant side.
B. 2Fe + O2 Fe2O3 is not balanced because there are 3 oxygen atoms on the product side while there are only 2 on the reactant side.
C. 2H2 + O2 2H2O is balanced because there are 4 hydrogen atoms and 2 oxygen atoms on both the reactant and product sides.
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