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प्रश्न
Calculate the number of atoms in the following:
52 g of He
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उत्तर
4 g of He has atoms = 6.02 x 1023
∴ 52 g of He has atoms = `(6.02 xx 10^23 xx 52)/4`
= 78.26 x 1023
= 7.82 x 1024
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