Question

6 molecules of hydrogen (H2) react with 3 molecules of oxygen (O2) to produce some amount of water (H2O).

During this reaction, how many molecules of water (H2O) are produced?

Answer 1

The balanced chemical equation for the reaction of hydrogen gas with oxygen gas to produce water is:

\[
2 H_2 + O_2 \rightarrow 2 H_2O
\]

From the equation, you can see that 2 molecules of \( H_2 \) react with 1 molecule of \( O_2 \) to produce 2 molecules of \( H_2O \).

Now, if we start with 6 molecules of \( H_2 \) and 3 molecules of \( O_2 \):

- From the given \( H_2 \), 6 molecules can react as follows:
\[
6 H_2 \times \frac{1 O_2}{2 H_2} = 3 O_2
\]
This means you will need 3 molecules of \( O_2 \) to completely react with 6 molecules of \( H_2 \).

Using the ratios from the balanced equation, for every 2 \( H_2 \) molecules that react, 2 \( H_2O \) molecules are produced. Therefore:

\[
6 H_2 \rightarrow 6 H_2O
\]

Thus, the reaction produces **6 molecules of water (H2O)** in total.