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

  • question_answer
      Convert into mole (a) 20 g of water (Atomic masses of hydrogen and oxygen are 1 and 16 respectively) (b) 22 g of carbon dioxide (Atomic masses of carbon and oxygen are 12 and 16 respectively)

    Answer:

       (a) Atomic mass of water = 1x 2 + 16 = 18 u Number of moles in 20 g of water (b) Atomic mass of carbon dioxide = 12 + 2x16 = 44u Number of moles in 22 g of carbon dioxide


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