Question

what mass, in grams, of pyrite, FeS2 (MM=119.99 g/mol), contains 46.3 grams of sulfur.

A. 148 g

B. 92.6 g

C. 86.6 g (correct answer)

D. 53.5 g

E. 103 g

I got this wrong on a test and I'm not really sure about the steps to get to the answer, so please show work! Thank you :)

Answer 1

Molar mass of FeS₂ = 119.99 g/mol. Imolfes, has = 2x32 g s 119.99 q fesz has = 2x329 s = 64905 or 649S is present in = 119.999 fesz 46395 » » » = 119.99 x 46.3 286.698 resz Option (C) correct. [Atomic mass of S= 32g|mot] cü x 765