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Which of the following is the correct chemical formula for water?
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3. Chemical Reactions
Naming Molecular Compounds
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Which of the following is the correct chemical formula for dinitrogen pentoxide?
A
N2O3
B
NO2
C
N2O5
D
NO5
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Understand the naming convention for binary molecular compounds, which uses prefixes to indicate the number of atoms of each element in the compound.
Identify the prefix 'di-' means 2 and 'penta-' means 5, so 'dinitrogen pentoxide' indicates 2 nitrogen atoms and 5 oxygen atoms.
Write the chemical formula by placing the number of atoms as subscripts after each element symbol: N for nitrogen and O for oxygen.
Combine the symbols and subscripts to form the formula: N\_2O\_5.
Verify that the formula matches the name by checking the number of atoms corresponds to the prefixes given in the compound name.
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