Can someone tell me the products for these?

Question

HCl + Ca(OH)2 + CaCO3 > {answer?}
CuCO3 + Ca(OH)2 > {answer?}
NaCO3 + Mg(NO3)2 > {answer?}
Ba(NO3)2 + Na2CO3 > {answer?}

Answer 1

I don't know the first one.

Cu(OH)2 + CaCO3
NaNO3 + MgCO3
BaCO3 + NaNO3

just trade the second part of each molecule.

Answer 2

In the first one, you'll actually have two different reactions going on:

2 HCl + Ca(OH)2 --> 2 H2O + CaCl2

and

2 HCl + CaCO3 --> H2O + CO2 + CaCl2