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The Normal Freezing Point of Benzene (C6H6, 78 °\degree C, and Its Kf Value Is 5

Question 100

Multiple Choice

The normal freezing point of benzene (C6H6, 78.12 g/mol) is 5.49 °\degree C, and its Kf value is 5.12 °\degree C/m.To create a solution with a freezing point of 0.00 °\degree C, how many grams of naphthalene (C10H8, 128.2 g/mol) would need to be dissolved in 640.0 g of benzene?


A) 5.63 g
B) 137 g
C) 82.0 g
D) 187 g
E) 88.0 g

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