use the chemical reaction to answer the question.
2H2 + O2 -- 2H2O
There are four atoms of hydrogen before the reaction how many atoms hydrogen are present after the reaction?
1. 2
2. 5
3. 4
5. 8
3 answers
The correct answer is 4. After the reaction, two molecules of water (H2O) are formed, each containing two atoms of hydrogen. Therefore, there are a total of 4 hydrogen atoms present after the reaction.
instead of 5. 8 i meant 4. 8 sorry!!
No problem! If you meant to select 4. 8 as the answer, then that would be incorrect. The correct answer is 4, as explained in the previous response. There are four atoms of hydrogen before the reaction, and after the reaction, they combine with oxygen to form two molecules of water, which contain a total of four hydrogen atoms.