Answer:
The answer to your question is 80%
Explanation:
Data
mass percent of SO₄⁻²
molecule MgSO₄
Process
1.- Calculate the molecular mass of magnesium nitrate
molecular mass = (1 x 24) + (1 x 32) + (4 x 16)
= 24 + 32 + 64
= 120 g
2.- Calculate the molecular mass of sulfate ion
molecular mass = (1 x 32) + (4 x 16)
= 32 + 64
= 96
3.- Write a proportion to solve this problem
120 g of MgSO₄ ---------------- 100 %
96 g of SO₄⁻² --------------- x
x = (96 x 100) / 120
x = 80 %
