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

  • question_answer
      (a) How do we express number of particles in terms of moles? (b) Calculate the number of moles of sodium in a sample containing 1020 atoms of sodium. (c) How do we express mass of a substance in terms of moles? (d) Calculate the number of moles in (i) 56 g of He                       (ii) 23gofNa

    Answer:

                     (a) Number of moles (b) Number or moles (c)Number of moles (d)(i)Number of moles   (ii)Number of moles


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