x y M waN 8980: Ch 5 & Ch N 3 a Stereochemistry 23: Soln, × x od/smartwork/view.

Question

x y M waN 8980: Ch 5 & Ch N 3 a Stereochemistry 23: Soln, × x od/smartwork/view.php?id 459152 RK Print Calulator Perod. Table Ebox tion 26 of 44 (1 point) X Incorrect (-)-Cholesterol has a specific rotation of -32. A mixture of ()and (-+cholesterol was analyzed by polarimetry, and the observed rotation was 14 What is the percent composition of the (+)isomer in this mixture? Assume 1 g of sample was dissolved in 1 mL water and the sample cell was 1 dm long. Express your answer in a whiole number and no units. Number Tools ×10 Check Answr View Solution O Esit Actvity Progress 2223|24|25 26 27·28293031

Explanation / Answer

let fraction of +isomer be x .Then fraction of - isomer will be (1-x)
total rotation = x*(+32) + (1-x)*(-32)
14 = 32x -32 + 32x
46 = 64 x
x=0.72
so,percentage of + isome is 72%
Answer: 72%

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