Multiple Choice
What is the correct name for the molecular compound P2O3?
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3. Chemical Reactions
Naming Molecular Compounds
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What is the correct name for ClO_2?
A
Chlorine oxide
B
Dichlorine monoxide
C
Chlorine dioxide
D
Chlorine(II) oxide
Verified step by step guidance1
Identify the chemical formula given: ClO_2, which consists of one chlorine (Cl) atom and two oxygen (O) atoms.
Recall the naming convention for binary molecular compounds, which typically uses Greek prefixes to indicate the number of atoms: 'mono-' for 1, 'di-' for 2, 'tri-' for 3, etc.
Since there is one chlorine atom, the prefix 'mono-' is usually omitted for the first element, so we just say 'chlorine'. For two oxygen atoms, use the prefix 'di-' combined with 'oxide' to indicate oxygen.
Combine the parts to form the name: 'chlorine' + 'di-' + 'oxide' = 'chlorine dioxide'.
Confirm that this name correctly reflects the formula ClO_2 and distinguishes it from other chlorine oxides like Cl_2O (dichlorine monoxide).
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