Multiple Choice
Which is the correct IUPAC name for the molecular compound NO?
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3. Chemical Reactions
Naming Molecular Compounds
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Which of the following is the correct chemical formula for iodine tribromide?
A
I3Br
B
IBr
C
IB3
D
IBr3
Verified step by step guidance1
Understand the naming convention for chemical compounds: 'iodine tribromide' indicates a compound made of iodine (I) and bromine (Br) atoms, where 'tri-' means three bromine atoms are present.
Identify the elements involved: iodine (I) and bromine (Br). The prefix 'tri-' applies to bromine, so the formula must contain one iodine atom and three bromine atoms.
Write the chemical formula by placing the symbol for iodine first (since it is named first) followed by the symbol for bromine with the subscript 3 to indicate three bromine atoms: \(I\!Br_3\).
Check the other options to confirm they do not match the naming: \(I_3Br\) would mean three iodine atoms and one bromine atom, and \(IB_3\) is not a correct chemical notation since bromine is represented as Br, not B.
Conclude that the correct chemical formula for iodine tribromide is \(I\!Br_3\).
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