Phosphorous trichloride (PC13) is produced from the reaction of white phosphorous (P1)
and chlorine:
Pa(s) + 6 Cl2(g) → 4PC13(g)
A sample of PCl, of mass 253.7 g was collected
from the reaction of 77.97 of P, with excess
chlorine. What is the percentage yield of the
reaction?
Answer in units of %

Which best describes the present-day universe? opaque, expanding very slowly, stars produce heavy elements transparent, expanding at an accelerated rate, stars produce heavy elements opaque, expanding at an accelerated rate, stars produce only hydrogen and helium transparent, expanding very slowly, stars produce only hydrogen and helium