Answers

2016-07-18T23:25:22+08:00
Ca(NO3)2. The "2" here is subscript. ^-^

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Ca(NO3)2 is calcium nitrate, the question is calcium nitride, nitride stands for nitrogen
2016-07-19T07:27:11+08:00
Calcium has an oxidation number of 2 while nitrogen has 3, do the cross multiplication so the formula is Ca3N2. (3 and 2 should be written as subscript)
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