Question

Same?
40. Two minerals that contain Cu are CuFeS2, and Cu2S. What mass of Cu2S would
contain the same mass of Cu as is contained in 125lb of CuFeS2
?
​

Answer 1

Answer:

question it's wrong please right question your CU 2S or not scientific sequence form

Answer 2

Answer:

54.2 lb of Cu2S.

Explanation:

Hey,

Thanks for Ask to Answer.

As,

1 lb = 453.59 g

So,

125 lb of CuFeS2 = 125 x 453.59 g

= 56698.75 g

Molecular mass of CuFeS2 is184 g

Here,

184 g of CuFeS2 contains 64 g of Cu.

So,

56698.75 g of CuFeS2 should contain

= 64184×56698.75

= 19721.30 g Cu

Now,

Molecular mass of Cu2S = 160 g

i.e. 160 g of Cu2S contains 128 g of Cu

So,

19721.30 g of Cu will be present in

= 160128×19721.30 g

= 24651.625 g

= 54.2 lb

Answer:

54.2 lb of Cu2S contains the same

mass of Cu as contained in 125 lb of

CuFeS2.

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