The mass of a molecule of water is

  1. A

    3×1026 kg

  2. B

    3×1025 kg

  3. C

    1.5×1026 kg

  4. D

    2.5×1026 kg

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    Solution:

    6×1023 molecules has mass =18 gm
    1 molecule has mass =186×1023=3×1023 gm
    =3×1026 kg

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