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1. a pure solvent freezes at 53.0 degree C. A solution of 1.93 g of biphenyl...

1. a pure solvent freezes at 53.0 degree C. A solution of 1.93 g of biphenyl (MM=154.2 g/mol) plus 27.40 g of this solvent freezes at 17.5 degree C. What is Kf for this solvent in Degree C/m

2. A mixture of 2.84 g of unknown plus 29.66 g of benzophenone freezes at 12.0 degrees C. (Pure Benzophenenone freezes at 48.1 degrees C and has a Kf = 98.1 Degree C/m)

What is the molar mass of this unknown in g/mol?

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