Calculate the number of He atoms in (i) `52 u`, (ii) `52 g`, (iii) `52` moles of He. Atomic wt. of He is `4 u`.

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Q 3132845732.     Calculate the number of He atoms in (i) `52 u`,
(ii) `52 g`, (iii) `52` moles of He.
Atomic wt. of He is `4 u`.

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