Hydrogen and chlorine combine to form hydrogen chloride gas.
What is the molecule ratio of the gases? Name the law.

Explanation

To solve the question regarding the combination of hydrogen and chlorine to form hydrogen chloride gas, we can follow these steps:

### Step-by-Step Solution:

1. **Write the Balanced Chemical Equation**:
The first step is to write the balanced chemical equation for the reaction between hydrogen (H₂) and chlorine (Cl₂) to form hydrogen chloride (HCl).
\[
\text{H}_2(g) + \text{Cl}_2(g) \rightarrow 2 \text{HCl}(g)
...