Question

Use the chemical reaction to answer the question.

2H2+O2→2H2O
2
H
2
+
O
2
→
2
H
2
O

There are four atoms of hydrogen (H
H
) before the reaction. How many atoms of hydrogen are present after the reaction?

(1 point)
Responses

8
8

4
4

5
5

2

Answer 1

In the given chemical reaction:

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

Before the reaction, we have:
- 2 molecules of \(H_2\), which means \(2 \times 2 = 4\) hydrogen atoms.

After the reaction, we have:
- 2 molecules of \(H_2O\), which means \(2 \times 2 = 4\) hydrogen atoms.

Therefore, the number of hydrogen atoms present after the reaction is **4**.

So the correct response is:

4