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Answer:

phosphorous pentabromide

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The name of the compound PBr5 is phosphorous pentabromide. In naming binary molecular compounds, we use prefixes to indicate the number of atoms of each element present in the compound. In this case, 'penta-' indicates that there are five bromine atoms (Br) bonded to one phosphorus atom (P). The term 'phosphorous' refers to the oxidation state of phosphorus in this compound. It is important to note that the prefix 'mono-' is often omitted for the first element if there is only one atom, which is why we do not say 'monophosphorous'. Therefore, the correct name is phosphorous pentabromide.

Topic: Chemistry, Binary Molecular Compounds, Nomenclature

Tags: chemistry nomenclature binary compounds molecular compounds

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What is the name of this binary molecular compound? PBr5

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