1.

Criss cross method of cupric sulphate

Answer»

Explanation:

The SUBSCRIPTS are then REDUCED by the greatest common factor. The chemical FORMULA compound by Cris's cross method of copper SULPHATE is CuSo4 where the valency of Cu is 2 and valency of So4 is 2. So after CRISS cross method the formula is Cu2(So4)2

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