How could you make the reaction Cu(NO3)2 + NaCO3 -- CuCo3+NaNO3 balanced?
You have the formula for sodium carbonate wrong> Na2CO3
The carbonate ion is -2 valence, and Na is +1. Now it will balance.
You have the formula for sodium carbonate wrong> Na2CO3
The carbonate ion is -2 valence, and Na is +1. Now it will balance.