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a) Ca+Cl2=>CaCl2
b) Mg + H2O => MgO + H2
2.
CH4 + O2 =CO2+H2O
CH4+202=CO2+2H2O
Pb +O2= PbO
2Pb+O2=2PBO
Fe+S =Fe2S3
2Fe+3S=Fe2S3
4.
2 N2 + 5O2= 2NxOy
x-2
y-5
2CxHy + 5O2= 4CO+ 6H2O
x-2
y-6
PbxOy +4H2= 3Pb+ 4H2O
x-3
y-4
2CrxOy + 3C= 2Cr+ 3CO2
x-nic
y-3
CxHy + 8O3= 5COz+ 6H2O
x-5
y-12
z-nie wiem
PxOy + 6H2O= 4HzPO4
z-3
x-4
y-10