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Q)

Number of atoms in 558.5g Fe (at.wt of Fe=$55.85gmol^{-1})$ is

$\begin{array}{1 1}(a)\;6.023\times 10^{22}& (b)\;\text{twice that in 60g carbon} \\(c)\;\text{half that in 8g He}& (d)\;558.5\times 6.023\times 10^{23}\end{array} $

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