Question

Which of the following equations follows the Law of Conservation of Mass?

A.H2 + O2 2OH
B.CH4 + 3O2 2CO2 + 2H2O
C.2Mg + Cl MgCl2
D.2Fe + 3O2 Fe2O3
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Answer 1

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Answer 2

Answer: A.

Explanation: There are 2 hydrogen atoms and 2 oxygens atoms on the reactant side, and it yielded 2 oxygen and hydrogen atoms in the products.