Question

......................REACTION REVIEW...........................

Answer 1

NH4Cl+NaNO2 gives out???

Answer 2

When (NH4)2Cr2O7 is heated, its give out??

Answer 3

Urea when reacts with water it gives out??

Answer 4

1.
NH4Cl + NaNO2 -> NH4NO2 +NaCl
splits
NH4+, Cl-, Na+, NO2-

NH4NO2 is pretty nifty and a good way to get your name on a government list

2.
(NH4)2Cr2O7 - Delta -> N2 + H2O + CrO3
N2 abundant in and predominates our atmosphere it must be stable :), H2O its a common decomposition product and it is everywhere, and the metal chromium (Cr) wants to give away 6 electrons so I will go with CrO3

Balance
(NH4)2Cr2O7 - Delta -> N2 + H2O + CrO3
2N, 8H, 1 Cr, 7 O -> 2N, 2H, 1Cr, 4O
times the water by 4
(NH4)2Cr2O7 - Delta -> N2 + 4H2O + CrO3
2N, 8H, 1 Cr, 7 O -> 2N, 8H, 1Cr, 7O
looks balanced

final answer

(NH4)2Cr2O7 - Delta -> N2 + 4H2O + CrO3

3.


Urea is CO(NH2)2 from what I recall
I would guess the products would be
H2O + CO(NH2)2 ->CO2 + NH4

Drawing the mechanism is probably pretty simple I would like to try but I'm far to lazy and also I dont want to draw it with a track pad

Answer 5

Btw thanks for the problems they were fun :)