Question

18) 2(NH4)3PO4

# of
molecules:
# of
elements:
Name of element:
# of atoms:
Total # of atoms:
The #2 is a
(coefficient or subscript)

Answer 1

3(14+4)+28+64 = 54+92 = 146 gm/mol

Explanation:

Name of elements : 1) Nitrogen

2) hydrogen

3) phosphorus

4) oxygen