1. The elemental analysis of an organic solid extracted from gum arabic (a gummy substance used...

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1. The elemental analysis of an organic solid extracted from gum arabic (a gummy substance used in adhesives, inks, and pharmaceuticals) showed that it contained 40.0% C, 6.7% H, and 53.3% O. A solution of 0.650 g of the solid in 27.8g of the solvent diphenyl gave a freezing point depression of 1.56°C. Calculate the molar mass and molecular formula of the solid. (Kf = 8.00 °C/m) 2. The heat of fusion of acetic acid is 11.72 kJ/mol at the melting point 16.61°C. Calculate K for acetic acid. 1. The elemental analysis of an organic solid extracted from gum arabic (a gummy substance used in adhesives, inks, and pharmaceuticals) showed that it contained 40.0% C, 6.7% H, and 53.3% O. A solution of 0.650 g of the solid in 27.8g of the solvent diphenyl gave a freezing point depression of 1.56°C. Calculate the molar mass and molecular formula of the solid. (Kf = 8.00 °C/m) 2. The heat of fusion of acetic acid is 11.72 kJ/mol at the melting point 16.61°C. Calculate K for acetic acid.

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