I am Class Vii student need help in equation balancing

H2+O2=H2O
CaCo3=CaO+Co2
Zn+Hcl=Zncl2+H2
H2O=H2+O2
Na+cl2=NACL

please tell me if these equation balacing is correct

wrong
might be correct but check what your capital letters are.
wrong
wrong
wrong

you need to check that you have the same amounts of each element on each side of the equation.

Hi I'm LC and I need serious help with balancing equations. Can someone please assist me

A. H3PO4+Ca(OH) -> Ca3(PO4)2 +H2O

B. KI+Pb(NO3)2 ->KNO3+PbI2