Use the chemical reaction to answer the question.

Question

2H2+O2→2H2O

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

(1 point)
Responses

2
2

8
8

4
4

5

Answer 1

In the given chemical reaction:

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

Before the reaction, you have 4 hydrogen atoms (since \(2H_2\) contains 2 molecules of hydrogen, each having 2 hydrogen atoms, resulting in \(2 \times 2 = 4\) H atoms).

After the reaction, you also have 4 hydrogen atoms present in the 2 molecules of water produced (since \(2H_2O\) contains 2 molecules of water, each having 2 hydrogen atoms, resulting in \(2 \times 2 = 4\) H atoms).

Therefore, the number of hydrogen atoms present after the reaction is:

4