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Number of atoms in 558.5 gram Fe (at. wt. of Fe = 55.85 g mol-1) is

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in Some Basic Concepts of Chemistry by
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Number of atoms in 558.5 gram Fe (at. wt. of Fe = 55.85 g mol-1) is 

(a) twice that in 60g carbon 

(b) 6.023 × 1022

(c) half that in 8g He 

(d) 558.5 × 6.023 × 1023

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