10 Cr^IIO + 2 HN^VO₃ → N₂⁰ + 5 Cr₂^IIIO₃ + H₂O

This is an oxidation-reduction (redox) reaction:

2 N^V + 10 e^- → 2 N⁰ (reduction)

10 Cr^II - 10 e^- → 10 Cr^III (oxidation)

Change the oxidation states

Search by reactants (CrO, HNO₃)

1.	CrO + HNO3 → N2 + Cr2O3 + H2O
2.	CrO + HNO3 → Cr(NO3)3 + NO2 + H2O
3.	CrO + HNO3 → Cr(NO3)2 + H2O
4.	CrO + HNO3 → Cr2O3 + NO2 + H2O

Search by products (N₂, Cr₂O₃, H₂O)

1 2
1.	(NH4)2Cr2O7 → N2 + Cr2O3 + H2O
2.	NH4Cl + K2Cr2O7 → N2 + Cr2O3 + KOH + HCl + H2O
3.	CrO3 + NH3 → N2 + Cr2O3 + H2O
4.	(NH4)2CrO4 → N2 + Cr2O3 + NH3 + H2O
5.	NH4Cl + K2Cr2O7 → N2 + KCl + Cr2O3 + H2O
6.	CrO + HNO3 → N2 + Cr2O3 + H2O
7.	CrO3 + NH2 → N2 + Cr2O3 + H2O
8.	Cr + HNO3 → N2 + Cr2O3 + H2O
9.	((NH4)2Cr2O7) → N2 + Cr2O3 + H2O
10.	(NH4)2Cr2O7 + Mg + O2 → MgO + N2 + Cr2O3 + H2O
1 2

Search by reactants (CrO, HNO₃) and by products (N₂, Cr₂O₃, H₂O)

1.	CrO + HNO3 → N2 + Cr2O3 + H2O