Balancing Equations Quiz

Could anyone post sites that ahve quizzes or questions of balancing equations in chemistry?

P.S.: I already know these two: http://gemini.tntech.edu/~snorthrup/chem111/tutorials/CHAP3/start.html and richardbowles.tripod.com/chemistry/balance.htm

How about this: http://funbasedlearning.com/chemistry/chembalancer/default.htm

Thats a game...anything else Please

Here are a few easy questions from my old chem book:

Na2S(aq) + Cu(NO3)2(aq) -> NaNO3(aq) + CuS(s)

HCL(aq) + O2(g) -> H2O(l) + Cl2(g)

Co(NO3)3(aq) + (NH4)2S(aq) -> Co2S3(s) + NH4NO3(aq)

Hg2(C2H3O2)2(aq) + KCL(aq) -> Hg2Cl2(s) + KC2H3O2(aq)

C6H12O6(aq) + O2(g) -> CO2(g) + H2O(l) (this one is for cellular respiration )

I don't need to use the (s), (l), (g) and (aq) BTW

Na2S + Cu(NO3)2 -> Na(NO3) + CuS

2Na2S + 2Cu(NO3)2 -> 4Na(NO3) + 2CuS
=============================================
HCl + O2 -> H2O + Cl2

4HCl + O2 -> 2H2O + 2Cl2
=============================================
Co(NO3)3 + (NH4)2S -> Co2S3 + (NH4)(NO3)

2Co(NO3)3 + 3(NH4)2S -> Co2S3 + 6(NH4)(NO3)
=============================================
Ok!! Lol, I don't think she'll go mad and give me a question like that..have the class (I used to, tll today) be confused

Did I get the first 3 correct?

lol the book answer for the first one is Na2S + Cu(NO3)2 -> 2NaNO3 + CuS ... which is basically the reduced (empirical? O.o) form of
2Na2S + 2Cu(NO3)2 -> 4Na(NO3) + 2CuS but which ever one you prefer of course

Here are the answers for the ones you were too lazy to do :p

________________________
Hg2(C2H3O2)2(aq) + KCL(aq) -> Hg2Cl2(s) + KC2H3O2(aq)

Hg2(C2H3O2)2(aq) + 2KCL(aq) -> Hg2Cl2(s) + 2KC2H3O2(aq)

------------------------------------------------------------------------

C6H12O6(aq) + O2(g) -> CO2(g) + H2O(l)

C6H12O6(aq) + 6O2(g) -> 6CO2(g) + 6H2O(l)


I hope she goes nuts BTW and gives you some real crazy ones

Curse you!! If she does, you'll be banned for the 4th time lol!