Explanation Given The elevation in boiling point is 0.49 ° C . The mass of adrenaline in the solution is 0.64 g . The mass of CCl 4 in the solution is 36.0 g . The conversion of mass from g into kg is done as, 1 g = 10 − 3 kg Hence, the conversion of mass from 36.0 g into kg is, 36.0 g = 36.0 × 10 − 3 kg = 0.036 kg The molarity of the given solution is calculated by the formula, Δ T b = i K b ⋅ m m = Δ T b i K b Where, Δ T b is the elevation in boiling point. i is the van’t hoff factor which describes the number of ions of solute particles in the solution. m is the molality of the solution. K b is the molal boiling point elevation constant ( 5.02 ° C/m ) .(refer table 13.3) Substitute the values of Δ T b , i and K b in above equation. m = 0.49 ° C 1 × 5

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Chapter 13, Problem 79E

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To determine: The molar mass of adrenaline in the given solution.

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Chapter 13, Problem 78E

Chapter 13, Problem 80E

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