chemistry help!!

Question

Phosphorous trichloride (PCl3) is produced from the reaction of white phosphorous (P4) and chlorine: P4(s) + 6 Cl2(g) → 4 PCl3(g) . A sample of PCl3 of mass 298.2 g was collected from the reaction of 72.83 g of P4 with excess chlorine. What is the percentage yield of the reaction? Answer in units of %.

Answer 1

Theoretical yield of PCl3 = (72.83 g P4)(1 mol P4 / 123.895 g P4)(4 mol PCl3 / 1 mol P4)(137.3328 g PCl3 / mol PCl3) = 322.92 g

 

% yield = (298.2 g / 322.92 g)(100%) = 92.34 %