write chemical formula of the following compounds using Criss cross method calcium formate and Aluminium sulphate
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Answer:
1. (HCOO)2Ca
CA2+ HCOO-
\ /
2\ /1
/ \
Ca (HCOO)2
2. Al2(SO4)3
Al3+ SO4-2
\ /
3\ /2
/ \
Al2 (SO4)3
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