Question

based on the chemical equation, use the drop - down menu to choose the coefficients that will balance the chemical equation: ( )zn + ( )hcl → ( )zncl₂ + ( )h₂

Explanation:

Step1: Balance Zn atoms

On the left side, we have 1 Zn atom. On the right side, in \(ZnCl_2\), we also have 1 Zn atom. So the coefficient for Zn is 1.

Step2: Balance Cl atoms

On the right side, \(ZnCl_2\) has 2 Cl atoms. So on the left side, in HCl, we need 2 Cl atoms. Thus, the coefficient for HCl is 2.

Step3: Balance H atoms

On the left side, HCl has 2 H atoms (since coefficient of HCl is 2). On the right side, \(H_2\) has 2 H atoms (1 molecule of \(H_2\) has 2 H atoms). So the coefficient for \(H_2\) is 1. And the coefficient for \(ZnCl_2\) is 1 (since Zn is already balanced).

Answer:

The coefficients are 1 (for Zn), 2 (for HCl), 1 (for \(ZnCl_2\)) and 1 (for \(H_2\)). So the balanced equation is \(1Zn + 2HCl
ightarrow 1ZnCl_2 + 1H_2\)