Question

One half of a balanced chemical equation is shown.

3Mg(OH)2 + 2H3PO4

Which lists the numbers of each atom the other half of the equation would contain?

3 Mg, 2 P, 14 O, 12 H
Mg, 2 P, 14 O, 6 H
3 Mg, 8 P, 7 O, 6 H
6 Mg, 6 P, 2 O, 12 H

Answer 1

3 Mg, 2 P, 14 O, 12 H

Explanation: 3 Mg(OH)2 gives 3 Mg, 3×2 = 6 O and 6 H. 2 H3PO4 gives 2 P, 2×4 = 8 O and 2×3 = 6 H. Total = 3 Mg, 2 P, 6+8 = 14 O, 6+6 = 12 H.