The freezing point of a solution of \( 2.40 \mathrm{~g} \) of biphenyl \( \left(\mathrm{C}_{12} ...

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The freezing point of a solution of \( 2.40 \mathrm{~g} \) of biphenyl \( \left(\mathrm{C}_{12} \mathrm{H}_{10}\right) \) in \( 75.0 \mathrm{~g} \) of benzene \( \left(\mathrm{C}_{6} \mathrm{H}_{6}\right) \) is \( 4.40^{\circ} \mathrm{C} \). The normal freezing point of benzene is \( 5.50^{\circ} \mathrm{C} \). What is the molal freezing point constant \( \left({ }^{\circ} \mathrm{C} / \mathrm{m}\right) \) for benzene?
(a) \( 5.3 \)
(b) \( 5.1 \)
(c) \( 4.6 \)
(d) \( 4.8 \)
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