2H2+O2→2H2O
There are four atoms of hydrogen (H) before the reaction. How many atoms of hydrogen are present after the reaction?

4

8

5

2

Answer:

2

Explanation:

The number of atoms of hydrogen that are present after the reaction is 4. The correct option is the first option - 4

From the question,

We are to determine the number of atoms of hydrogen present after the reaction.

From the law of conservation of mass which states that

"Matter can neither be created nor destroyed"

This means, the number of atoms are the same before and after the chemical reaction.

Since the number of hydrogen atoms before the reaction is four, then there would be four hydrogen atoms after the reaction.

Hence, the number of atoms of hydrogen that are present after the reaction is 4. The correct option is the first option - 4

Learn more on the Law of conservation of mass here: https://brainly.com/question/2030891

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