Question

3 molecules of hydrogen (H2) react with 3 molecules of chlorine (Cl2) to produce some amount of hydrogen chloride (HCl).
Complete the table below.
Chemical element Number of atoms in the reaction

During this reaction, how many molecules of hydrogen chloride (HCl) are produced?

Answer 1

The reaction between hydrogen (H₂) and chlorine (Cl₂) to produce hydrogen chloride (HCl) can be represented by the balanced chemical equation:

\[ 3 \text{H}_2 + 3 \text{Cl}_2 \rightarrow 6 \text{HCl} \]

From this equation, we can see that for every 3 molecules of hydrogen and 3 molecules of chlorine, 6 molecules of hydrogen chloride are produced.

Here's the completed table with the number of atoms in the reaction:

| Chemical element | Number of atoms in the reaction |
|------------------|---------------------------------|
| Hydrogen (H) | 6 (from 3 H₂ molecules) |
| Chlorine (Cl) | 6 (from 3 Cl₂ molecules) |
| Hydrogen chloride (HCl) | 6 (produced from 6 HCl) |

### Summary
- During this reaction, **6 molecules of hydrogen chloride (HCl)** are produced.