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# The weight of one molecule of a compound $C_{60}H_{122}$ is

$\begin{array}{1 1}(a)\;5.01\times 10^{-21}g&(b)\;1.3\times 10^{-20}g \\(c)\;3.72\times 10^{23}g&(d)\;1.4\times 10^{-21}g\end{array}$

Molecular mass of $C_{60}H_{122}=842$
$6.023\times 10^{23}$ molecule weighs=842g
Weight of one molecule =$1.4\times 10^{-21}g$
$\therefore$ The option is (d) $1.4\times 10^{-21}g$