Multiple Choice
What is the correct name for the covalent compound PCl_5?
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3. Chemical Reactions
Naming Molecular Compounds
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What is the correct name for the molecular compound P_4S_3?
A
tetraphosphorus tetrasulfide
B
phosphorus(III) sulfide
C
phosphorus trisulfide
D
tetraphosphorus trisulfide
Verified step by step guidance1
Identify the elements and their quantities in the molecular formula: P_4S_3 contains 4 phosphorus (P) atoms and 3 sulfur (S) atoms.
Recall the naming rules for molecular (covalent) compounds: use Greek prefixes to indicate the number of atoms of each element, and name the second element with an '-ide' suffix.
Apply the prefixes: 'tetra-' for 4 phosphorus atoms and 'tri-' for 3 sulfur atoms.
Combine the prefixes with the element names: 'tetraphosphorus' for P_4 and 'trisulfide' for S_3.
Put the names together to form the full compound name: 'tetraphosphorus trisulfide'.
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