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

  • question_answer
      12 g of He is equal to how many atoms?

    Answer:

      Molar mass of He =4 g 4g He = 1mol                   =6.022 x1023 atoms         4 g of He contains 6.022 x 1023 atoms 12 g or He will contain = 18 .066 x 1023 atoms Hence, 12 g of He is equal to 18.066 x 1023 atoms,


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