If you have a magnesium for every oxygen, then you have to start with two magnesiums. So the balanced equation is 2 Mg + O2 2 MgO.
And
CaCO3———→CaO + CO2
I hope it helped!
Here are the balanced equations
- C_2H_5OH+3O_2--->2CO_2+3H_2O+Energy
- 2AgCl-->2Ag+Cl_2
- AgNO_3+Zn--->Ag+ZnNO_3
- 3BaCl_2+Al_2(SO_4)_3--->3BaSO_4+2AlCl_3
- H_2+I_2--->2HI
Done!
I think 3 of them are its been 1 half years since ive done this i dont take chemistry anymore
