What is the total concentration of cations in a solution made by combining 700.0 mL of 3.0 M (NH4)3PO4 with 300.0 mL of 2.0 M Na2SO4? numbers next to compounds are subscripts

Answer 1

millimols NH4^= = 3 x mL x M = ?
millimols Na^+ = 2 x mL x M = ?
Total millimols cations = ?
Concn cations in M = millimols/total mL.

Answer 2

lol no litfam doug