Answers

  • Brainly User
2014-04-24T10:31:27+05:30
Since mass of one atom of He = 4a.m.u
Therefore 100 a.m.u no. of He atom will be 100/4=25 
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2014-04-24T11:03:37+05:30
The number of atoms in 100 amu of helium is 25
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