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 2 2 8 8 5 5 4

Answer 1

There are four atoms of hydrogen before the reaction. After the reaction, each water molecule (H2O) contains two hydrogen atoms. Since two water molecules are formed in the reaction, there are a total of 4 hydrogen atoms after the reaction. Thus, the correct answer is 4.