Answer:
The answer to your question is 3, 2, 6, 1
Step-by-step explanation:
Unbalanced chemical reaction
CoBr₂ + K₃PO₄ ⇒ KCl + Co₃(PO₄)₂
Reactants Elements Products
1 Co 3
2 Cl 1
3 K 1
1 P 2
4 O 8
Balanced chemical reaction
3CoCl₂ + 2K₃PO₄ ⇒ 6KCl + Co₃(PO₄)₂
Reactants Elements Products
3 Co 3
6 Cl 6
6 K 6
2 P 2
8 O 8