Chemistry, 19.02.2020 23:04 earcake2470
The formula of calcium oxide is CaO. What is the formula of the ionic compound containing calcium and permanganate ions?
Answers: 2
and this ion has an overall charge of -1. On the other hand, calcium is an alkaline earth metal and it has a valency of +2. Therefore, when it will chemically combines with permanganate ion then according to cross-multiplication formula it will be multiplied by 2. 
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