Question

Use the chemical reaction to answer the 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

4
4

5
5

8
8

2

Please answer correctly

Answer 1

In the given reaction:

2H2 + O2 → 2H2O

There are 4 atoms of hydrogen (H) before the reaction because each molecule of H2 contains 2 hydrogen atoms, and there are 2 molecules of H2 (2 × 2 = 4 H atoms).

After the reaction, in 2H2O, each water molecule (H2O) contains 2 hydrogen atoms, and there are 2 water molecules (2 × 2 = 4 H atoms).

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

The correct answer is:
4