Does this equation need to be balanced?

AlCO3 => AlO+CO2

Also, how would this equation be balanced?
NiCl+O2 => Ni2O3+Cl2O5

Neither equation you have is an equation so they can't be balanced.
Do you mean aluminum carbonate. That would have the formula Al2(CO3)2. Aluminum oxide is Al2O3. NiCl2 is nickel(II) chloride. Get your formulas straight and repost if you still have trouble balancing.

Ni2O3+FeII=Ni

To balance an equation, you need to ensure that the number of atoms of each element is the same on both sides of the equation. Let's start by correcting the formulas you mentioned:

Equation 1: Al2(CO3)3 -> Al2O3 + 3CO2
Equation 2: 2NiCl2 + O2 -> Ni2O3 + Cl2O5

Now, let's balance each equation step by step:

Equation 1: Al2(CO3)3 -> Al2O3 + 3CO2

Start by balancing the aluminum atoms. We have 2 aluminum atoms on the left and 2 on the right. They are already balanced.

Next, balance the carbon atoms. We have 3 carbon atoms in the carbonate ion on the left, and 1 carbon atom in the carbon dioxide on the right. To balance them, put a coefficient of 3 in front of CO2.

Finally, balance the oxygen atoms. On the left, we have 3 oxygen atoms from the carbonate ion and 2 oxygen atoms from the aluminum oxide, which totals 5 oxygen atoms. On the right, we have 3 oxygen atoms from CO2. To balance them, put a coefficient of 3 in front of Al2O3.

The balanced equation is: 2Al2(CO3)3 -> 3Al2O3 + 6CO2

For Equation 2: 2NiCl2 + O2 -> Ni2O3 + Cl2O5

Start by balancing the chlorine atoms. We have 4 chlorine atoms on the left (2 from each NiCl2) and 2 on the right (from Cl2O5). To balance them, put a coefficient of 2 in front of Cl2O5.

Next, balance the nickel atoms. We have 2 nickel atoms on the left and 2 on the right. They are already balanced.

Finally, balance the oxygen atoms. On the left, there are 2 oxygen atoms from O2 and 10 oxygen atoms from Cl2O5, which totals 12 oxygen atoms. On the right, we have 3 oxygen atoms in Ni2O3. To balance them, put a coefficient of 6 in front of O2.

The balanced equation is: 2NiCl2 + 6O2 -> Ni2O3 + 2Cl2O5