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प्रश्न
Calculate the number of atoms of the 52 u of He.
संख्यात्मक
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उत्तर
1 atom of He = 4 u of He
Or,
4 u of He = 1 atom of He
1 u of He `=1/4` atom of He
52u of He `=52/4` atom of He
= 13 atoms of He
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