Identify any incorrect formulas. explain your answer.

Question

a. Mg2(SO4)3
b. Rb3As
c. BeCl3
d. NaF

Answer 1

Check a.
Check c.

Answer 2

a.cross magnesium and sulfate, sulfate has -2 charge and mg +2 charge, same charges cross out, MgSO4
c.chlorine is Cl -1 charge, beryllium has +2 charge, cross charges, BeCl2

Answer 3

What Mg2(S04)3

Answer 4

Mg2(SO4)3
BeCl3
AsRb3
NaF