Respuesta :

wuzzleluver
3 to balance the calciums on both sides of the equation, but only if that balances the Cl on both sides of the equation to because you now have 6 Cl and 3Ca 
sebassandin

Answer:

3 (three).

Explanation:

Hello,

Perhaps, you are talking about the following undergoing chemical reaction:

[tex]CaSO_4+AlCl_3-->CaCl_2+Al_2(SO_4)_3[/tex]

Thus, balancing it by inspection, one obtains:

[tex]3CaSO_4+2AlCl_3-->3CaCl_2+Al_2(SO_4)_3[/tex]

In such a way, a 3 (three) must be placed in front of the calcium chloride [tex]CaCl_2[/tex] in order to balance calcium and consequently the rest of the chemical reaction.

Best regards.

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