Question

How many atoms of each element are in 4Na3PO4?

A.) 3 sodium, 1 phosphorus, 4 oxygen
B.) 4 sodium, 4 phosphorus, 4 oxygen
C.) 12 sodium, 1 phosphorus, 4 oxygen
D.) 12 sodium, 4 phosphorus, 16 oxygen

Answer 1

D) 12 sodium, 4 phosphorus. 16 oxygen

Step-by-step explanation:

there is a four in front of the full formula, so you multiply all of the sub numbers by 4

Answer 2

D) 12 sodium, 4 phosphorus, 16 oxygen

sodium: 4Na3 -> 4 • 3 = 12

phosphorus: 4P - > 4

oxygen 4O4 -> 4 • 4 = 16

(the four is from the four in front of the whole formula)