Question
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 2 2 5 5 4 4 8
Answers
GPT-4o mini
The balanced chemical reaction is:
\[ 2H_2 + O_2 \rightarrow 2H_2O \]
Before the reaction, there are 4 hydrogen (H) atoms in the reactants (from 2 molecules of \( H_2 \)).
After the reaction, in the products, there are also 2 molecules of water (\( H_2O \)). Each water molecule contains 2 hydrogen atoms, so:
\[ 2 \text{ molecules of } H_2O \times 2 \text{ H atoms/molecule} = 4 \text{ H atoms} \]
Therefore, the number of hydrogen atoms present after the reaction is:
**4**
\[ 2H_2 + O_2 \rightarrow 2H_2O \]
Before the reaction, there are 4 hydrogen (H) atoms in the reactants (from 2 molecules of \( H_2 \)).
After the reaction, in the products, there are also 2 molecules of water (\( H_2O \)). Each water molecule contains 2 hydrogen atoms, so:
\[ 2 \text{ molecules of } H_2O \times 2 \text{ H atoms/molecule} = 4 \text{ H atoms} \]
Therefore, the number of hydrogen atoms present after the reaction is:
**4**