Answer
137.32 g/mol
Work Step by Step
1
he atomic weight of an element on the periodic chart is equal to the mass of one mole of that atom (in grams).
One mole of PCl3 has one mole of Phosphorous and 3 moles of Chlorine.
P 30.974 g/mol
+Cl 3* (35.453)g/mol
= molar mass of PCl3
2
30.97g+(35.45g x3)=137.32g/mol
