Answer:
A larger nuclear charge :)
Explanation:
1Al2(SO4)3 + 3ZnCl2 → 2AlCl3 + 3ZnSO4
The coefficients represents moles. There is 1 mole of Aluminum Sulfate, 3 moles of Zinc(II) Chloride, 2 moles of Aluminum Chloride, and 3 moles of Zinc(II) Sulfate.
Now add all the coefficients/moles.
9 is the sum of all the coefficients.
A;4, b;6, c;7, d;5, e;8, f;3
The formula for K+ and S-2 is K2S because you need 2 potassium ions to balance out the sulfide ion
The answer is "Incidents"