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  3. Chemistry
  4. The mass of a hydrogen is.......kg.

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Q. The mass of a hydrogen is.......kg.

IIT JEEIIT JEE 1982Structure of Atom

Solution:

Mass of one H-atom $ = \frac{ 10^{ - 3 }}{ 6.023 \times 10^{23}} kg = 1.66 \times 10^{ -27} \,kg.$