There are 4 atoms of hydrogen shown on the reactant side. How many total atoms of hydrogen must be on the product side?
2
4
6
8
The total number of atoms of hydrogen on the product side must be 6.
To determine the number of total hydrogen atoms on the product side, we can refer to the law of conservation of mass, which states that atoms are neither created nor destroyed during a chemical reaction.
If there are 4 atoms of hydrogen on the reactant side, then the total number of hydrogen atoms on the product side must also be equal to 4 in order to maintain the same number of atoms before and after the reaction.
Therefore, the correct answer is 4.