Bromoform has a normal freezing point of \( 7.734^{\circ} \mathrm{C} \) and \( K_{f}=14.4^{\circ...

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Bromoform has a normal freezing point of \( 7.734^{\circ} \mathrm{C} \) and \( K_{f}=14.4^{\circ} \mathrm{C} / \mathrm{m} \). A solution of \( 2.60 \mathrm{~g} \) of an unknown substance in \( 100 \mathrm{~g} \) of bromoform freezes at \( 5.43^{\circ} \mathrm{C} \). What is the molecular mass of the unknown substance?
(a) \( 16.25 \)
(b) \( 162.5 \)
(c) 100
(d) none of these
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