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Which of the following best describes the information provided by a molecular formula?
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3. Chemical Reactions
Molecular Formula
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How many oxygen atoms are present in one molecule of hydrogen peroxide (H2O2)?
A
4
B
3
C
2
D
1
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Identify the chemical formula of hydrogen peroxide, which is H\2O\2.
Understand that the subscript numbers in a chemical formula indicate the number of atoms of each element in one molecule.
Look at the subscript for oxygen (O) in H\2O\2, which is 2.
This means there are 2 oxygen atoms in one molecule of hydrogen peroxide.
Therefore, the number of oxygen atoms in one molecule of H\2O\2 is 2.
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