A 50.0 g sample of a compound contains 2.20 x 10²³ molecules.Which of the following could be this compound?

Question

Quizplus · Accepted Answer

To determine the compound, we need to calculate the molar mass using Avogadro's number (6.022 x 10^23). Number of molecules = 2.20 x 10^21 Molar mass = (50.0 g) / (2.20 x 10^21 molecules) x (6.022 x 10^23 molecules/mol) = 231 g/mol Now we can look at the answer choices and see which one has a molar mass closest to 231 g/mol: A) PH₃ = 97 g/mol B) NH₃ = 80 g/mol C) PCl₃ = 208 g/mol D) PCl₅ = 254 g/mol E) NF₃ = 94 g/mol Thus, the only option that has a molar mass close to 231 g/mol is option C, PCl13.

A 500 G Sample of a Compound Contains 2