Write a balanced chemical equation showing how each metal oxide reacts with hcl.

A metal oxide (such as ZnO, CuO) reacts with an acid to give to give the respective salt and water as by products.

Here, Consider the examples given below:

1) Zinc oxide reacts with hydrochloric acid:

ZnO (s) + 2HCl (aq) - - >ZnCl2 (aq) + H2O

2) Copper oxide reacts with hydrochloric acid:

CuO (s) + 2HCl (aq) - - >CuCl2 (aq) + H2O