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

  • question_answer
      Calculate the mass per cent of each element of sodium chloride in one mole of it.

    Answer:

                      Molecular mass of NaCI == (1 x 23 + 1 x 35.5) u = 58.5 u Atomic mass of sodium = 23 u Mass per cent of Mass % of Na == 39.316% Atomic mass of chlorine = 35.5 u Mass % of


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