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9th Class Science Atoms and Molecules Question Bank 9th CBSE Science Atoms and Molecules

  • question_answer
      Calculate the number of aluminium ions in 0.051 g of aluminium oxide. [Atomic mass of Al = 27 u]      

    Answer:

                      Molecular weight of Al 203 = 2x 27 + 3x 16 = 54 + 48 = 102 g. 102 g of contains ions. 0.051 g of contains ions.


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