Multiple Choice
Which of the following is the correct chemical formula for iodine trichloride?
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3. Chemical Reactions
Naming Molecular Compounds
Multiple Choice
Which of the following is the correct chemical formula for diarsenic pentoxide?
A
As2O5
B
As2O3
C
As5O2
D
AsO5
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Verified step by step guidance1
Identify the meaning of the prefixes in the compound name: 'di-' means 2 and 'penta-' means 5.
Recognize that 'diarsenic' indicates there are 2 arsenic (As) atoms in the formula.
Understand that 'pentoxide' means there are 5 oxygen (O) atoms in the formula.
Combine the number of atoms from the prefixes to write the chemical formula as As2O5.
Verify that the formula matches the name by checking the number of atoms for each element corresponds to the prefixes given.
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