Question

How much copper can be obtained from
200g of copper sulphate? (Atomic weight
of Cu=63, S=32, 0=16)​

Answer 1

Explanation:

Atomic mass of Sulphur (S) is 32μ and when expressed in grams is 32 g. Atomic mass of Oxygen (O) is 16μ and when expressed in terms of grams is 16 g. As, 159.5 g of Copper Sulphate (CuSO4) contains 63.5 g of Copper (Cu). Hence, 39.81 g of Copper (Cu) can be obtained from 100 g of Copper Sulphate (CuSO4).

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  

Best of luck ;)

albin