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

4

2

8

Answer 1

In the given chemical reaction:

\[ 2H_2 + O_2 → 2H_2O \]

• Before the reaction, there are 4 atoms of hydrogen because each molecule of \( H_2 \) contains 2 hydrogen atoms and there are 2 \( H_2 \) molecules (2 * 2 = 4).
• After the reaction, the product is 2 molecules of water (\( H_2O \)). Each water molecule contains 2 hydrogen atoms, totaling 2 * 2 = 4 hydrogen atoms.

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