Question

balance the chemical equation using the smallest possible whole number coefficients.
if the coefficient is 1, you may leave it blank.
hcl (aq) + cuo (s) → cucl₂ (aq) + h₂o (l)

Explanation:

Step1: Balance chlorine atoms

On the right - hand side, there are 2 chlorine atoms in \(CuCl_2\). So, we put a coefficient of 2 in front of \(HCl\) on the left - hand side: \(2HCl(aq)+CuO(s)\to CuCl_2(aq)+H_2O(l)\)

Step2: Check other atoms

Now, for copper, there is 1 \(Cu\) atom on both sides. For oxygen, there is 1 \(O\) atom on both sides (1 in \(CuO\) and 1 in \(H_2O\)). For hydrogen, there are 2 \(H\) atoms on both sides (2 in \(2HCl\) and 2 in \(H_2O\)).

Answer:

2, 1, 1, 1