Answer
1.01 mol $Cl_{2}$
Work Step by Step
$Si(s)+2Cl_{2}(g)$ -> $SiCl_{4}(l)$
mol of $Cl_{@}$=
$\frac{(0.507molSiCl_{4})\times(2molCl_{2})}{1molSiCl_{4}}$
= 1.01 mol $Cl_{2}$
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