Question

What is the molecular formula of ferrous nitrate and ferric nitrate
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Answer 1

Ferric iron has a charge of 3+, while ferrous iron has a charge of 2+. The nitrate anion looks like this:

NO3-

so the balanced compounds would be:

Ferric Nitrate: Fe(NO3)3
Ferrous Nitrate: Fe(NO3)2

Hope this helps!