Question

Copper is obtained from 100g of copper sulphate (Cuso4) is ____ *

A) 39.89 gm

B) 39.81 gm

C) 40.1 gm

D) 40.09 gm

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Answer 1

Answer:

Ans will be How much copper can be obtained from 100 g of copper sulphate (CuSO4 )? 1 mole of CuSO4 contains 1 mole of copper. 159.5 g of CuSO4 contains 63.5 g of copper

Answer 2

Answer:

Given -  

        Atomic mass of Cu = 63.5

         

Now  

      Molar mass of CuSO4

                                   = (63.5) + (32) + 4(16)

                                   =  63.5 +    32 +    64

                                   =  159.5 g

∵1 mole of CuSO4 contains 1 mole of copper.

⇒159.5 g of CuSO4 contains 63.5 g of copper

⇒100 g of CuSO4 will contain of copper = 63.5 *100g / 159.5

                                                                = 39.81 g

                                                                                  (REQUIRED ANSWER)

Hope it will help u ......

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