Question

What mass of iron is contained in 86.6 grams of chalcopyrite, CuFeS2?

Answer 1

26.428 gm

Step-by-step explanation:

molecular mass of CuFeS2 = 63.5+(2*32)+56 = 183.5 gm

Now we apply unitary method,

183.5 gm Chalcopyrite contains 56 gm Fe

∴ 86.6 gm Chalcopyrite contains
`(56)/(183.5) X 86.6`

= 26.428 gm Fe