SELECT * FROM question_mgmt as q WHERE id=1230 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=2 AND subId=9 AND chapterId=42 and ex_no='1' AND status=1 ORDER BY CAST(question_no AS UNSIGNED)

Question:

How much copper can be obtained from 100 g of copper sulphate (CuSO4)?

Answer:

1 mole of CuSO4 contains 1 mole of copper.

 

Molar mass of CuSO4 = atomic mass of Cu + atomic mass of S + 4X atomic mass of O

 

Molar mass of CuSO4 = (63.5) + (32.00) + 4(16.00)

 

= 63.5 + 32.00 + 64.00 = 159.5 amu

 

Gram molecular mass of CuSO4= 159.5 g

 

159.5 g of CuSO4 contains Cu = 63.5

 

1 g of CuSO4 contains Cu= 63.5/159.5* 1

 

Therefore 100g of CuSO4 contains Cu = 63.5/159.5*100 = 39.81 g


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