Multiple Choice
What is the correct name for the molecular compound SF_6?
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3. Chemical Reactions
Naming Molecular Compounds
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Which of the following is the correct chemical formula for phosphorus trichloride?
A
PCl5
B
PCl3
C
P2Cl3
D
P3Cl
Verified step by step guidance1
Understand the name of the compound: 'phosphorus trichloride' indicates a compound made of phosphorus (P) and chlorine (Cl) atoms.
The prefix 'tri-' means three, so 'trichloride' means there are three chlorine atoms bonded to phosphorus.
Write the chemical symbol for phosphorus, which is 'P'.
Write the chemical symbol for chlorine, which is 'Cl', and use the subscript '3' to indicate three chlorine atoms: 'Cl\_3'.
Combine the symbols to form the chemical formula: 'PCl\_3', which correctly represents phosphorus trichloride.
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