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(A) The number of atoms in 52 mole of He...

(A) The number of atoms in 52 mole of He is 31.3X`10^(24)`. (B) The number of atoms in 52amu of He is 13. (C) the number of atoms in 52g of He is 72.86X`10^(23)` (D) the number of atoms in 52g of He is 52.26 X`10^(23)`

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