One half of a balanced chemical equation is shown. 3 Mg(OH) sub 2 plus 2 cap h sub 3 PO sub 4 Which lists the numbers of each atom the other half of the equation would contain?

Count the atoms on the shown side: 3 Mg(OH)₂ gives 3 Mg, 6 O, and 6 H; 2 H₃PO₄ gives 2 P, 8 O, and 6 H. Altogether, the other half must contain 3 Mg, 2 P, 14 O, and 12 H because a balanced equation conserves each type of atom. That matches choice A.

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