1. Find the molar mass of PCl₃:
* Phosphorus (P) has a molar mass of 30.97 g/mol
* Chlorine (Cl) has a molar mass of 35.45 g/mol
* PCl₃ has one phosphorus atom and three chlorine atoms.
* Molar mass of PCl₃ = (1 * 30.97 g/mol) + (3 * 35.45 g/mol) = 137.32 g/mol
2. Use the molar mass to convert moles to grams:
* grams = moles * molar mass
* grams = 3.42 moles * 137.32 g/mol
* grams = 469.63 g
Therefore, there are 469.63 grams of phosphorus trichloride in 3.42 moles of the compound.
