2.The molecular weight for this compound is137.32g/mol. What is themolecularformula for this compound?
Molar mass of PCl3 = 137.33 g
Molecular ratio= Emprical ratio*molar mass/Molar mass of empirical formula
= (1:3)×(137.33/137.33)
= 1:3
Hence the molecular formula is PCl3
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