NEED HELP!!!:( balancing redox equations?

Question

--P4 + HNO3 + H2O -> H3PO4 + NO
--KMnO4 + H2SO3 -> K2SO4 + MnSO4 + H2SO4 + H2O
--Zn + HNO3 -> Zn(NO3)2 + NH4NO3 + H2O
--Cu + HNO3 -> Cu(NO3)2 + H2O + NO
--FeSO4 + K2Cr2O7 + H2SO4 -> Fe2(SO4)3 + Cr2(SO4)3 + K2SO4 + H2O

Answer 1

I just finished balancing all these. Got the same answers as Lancenigo, so I second his response. You may consider it "done and checked."

Answer 2

Lancenigo di Villorba (TV), Italy

REACTION 1)
3 P4 + 20 HNO3 + 8 H2O ---> 12 H3PO4 + 20 NO

REACTION 2)
2 KMnO4 + 5 H2SO3 --->
---> 2 MnSO4 + K2SO4 + 2 H2SO4 + 3 H2O

REACTION 3)
4 Zn + 10 HNO3 ---> 4 Zn(NO3)2 + NH4NO3 + 3 H2O

REACTION 4)
3 Cu + 8 HNO3 ---> 3 Cu(NO3)2 + 4 H2O + 2 NO

REACTION 5)
6 FeSO4 + K2Cr2O7 + 7 H2SO4 --->
---> 3 Fe2(SO4)3+ Cr2(SO4)3 + K2SO4 + 7 H2O

I hope this helps you.