1.46 moles
Explanation:
We are given ;
Mass of phosphorus trichloride is 200 g
We are required to calculate the number of moles of phosphorus trichloride;
We know that to calculate the number of moles we divide mass by the molar mass.That is;
Moles = Mass ÷ Molar mass
Molar mass of phosphorus trichloride = 137.33 g/mol
Therefore;
Moles = 200 g ÷ 137.33 g/mol
= 1.456 moles
= 1.46 moles
Therefore, the moles of phosphorus trichloride are 1.46 moles