СРОЧНО! Даю 75 баллов!!!!!!!!!!!!!
Осуществите превращения согласно схемам
1)NH4NO2---N2---NH3---NH4NO3---N2O
2) Zn(NO3)2---NO2---KNO3---HNO3---O2
3)N2--NO2---HNO3----NO--NH4NO3
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