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

5
5

8
8

4
4

2

Answer 1

In the chemical reaction you provided:

\[ 2H_2 + O_2 → 2H_2O \]

There are four hydrogen atoms (2 molecules of \(H_2\) each containing 2 hydrogen atoms) before the reaction.

After the reaction, the product \(2H_2O\) also contains a total of 4 hydrogen atoms (2 molecules of water, each containing 2 hydrogen atoms).

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

4

The correct response is 4.