Answered: A commercial juice is known to have 80…

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

A commercial juice is known to have 80 % of the daily allowance of vitamin C per serving (225 mL). If the daily allowance of vitamin C is 75.0 mg, what is the molarity of vitamin C in this juice (in M)?

Expert Solution

Step 1

Given that the daily allowance of Vitamin C is 75.0 mg and also given that 80 % of the daily allowance of vitamin C is present per serving (225 m L).

$\begin{matrix} 100 % indicates 75 mg \\ 80 % indicates' x' mg \\ Mass = \frac{80 % \times 75 mg}{100 %} = 60 mg \\ \begin{matrix} No . of moles = \frac{mass}{molar mass} \\ No . of moles = \frac{60.0 \times 10^{- 3} g}{176.12 g / mol} \\ No . of moles = 3.41 \times 10^{- 4} mol \end{matrix} \end{matrix}$

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