The equation is already balanced:
CaCO3(s) --> CaO(s) + CO2(g)
Explanation
A balanced chemical equation is one where the number of atoms on both sides are equal. Chemical equations must be balanced because there is only a rearrangement of atoms in a reaction so the number of atoms you start off with must be the same as the number of atoms you end up with.
If we take a look at the equation, we can see that there is 1 calcium atom, 1 carbon atom and 3 oxygen atoms present on both sides. As the number of these atoms on both sides are equal, the equation is balanced.
2HCl + CaCO3 -> CaCl2 + CO2 + H2O
PH3 + O2 ----> P4O10 + H2O 4PH3 + 8O2 ----> 1P4O10 + 6H2O P4H3O10 = P4H3O10 Balanced Answer : 4,8,1,6
The chemical equation is 2Na + H2SO4 --> Na2SO4 + H2
Seltzer Water
H2O + Ca ----> H2 + CaO
The answer is TWO (2)Na2CO3 + CaCl2 --> 2 NaCl + CaCO3
2HCl + CaCO3 -> CaCl2 + CO2 + H2O
CaCl2 + 2NaHCO3 --> 2NaCl + CaCO3 +CO2 +H2O
PH3 + O2 ----> P4O10 + H2O 4PH3 + 8O2 ----> 1P4O10 + 6H2O P4H3O10 = P4H3O10 Balanced Answer : 4,8,1,6
The chemical equation is 2Na + H2SO4 --> Na2SO4 + H2
iron :)
2Al + N2 ----> 2AlN
CaCO3 + HNO3. NO3^- and CO3^-2 are both polyatomic ions.
No. It would have to be H2O2 - H2 = O2 in order to be balanced.
Seltzer Water
H2O + Ca ----> H2 + CaO
2KClO2 + O2 = 2KClO3