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7. A solution containing 1.00g of an unknown substance in 12.5g of naphthalene was found to freeze at 75.4C. What is the molar mass of

7. A solution containing 1.00g of an unknown substance in 12.5g of naphthalene was found to freeze at 75.4C. What is the molar mass of the unknown substance? ( Kf for naphthalene is 6.94Ckg/mol, f.p. of naphthalene is 80.29C )

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