Question Detail

CHM 101 CHM 101 Past Questions Objective Question
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Question

Calculate the percentage composition of nitrogen in NutraSweet, an artificial sweetener, aspartame, C14H18N2O5, that is used to sweeten diet foods, coffee, and soft drinks.
Options
A 57.1 %
B 6.1 %
C 9.5 %
Correct Answer
D 27.2 %
Correct Answer

Option C is the correct answer.

Detailed Explanation

Molar mass of C14H18N2O5 = (14×12.01) + (18×1.008) + (2×14.01) + (5×16.00) = 168.14 + 18.144 + 28.02 + 80.00 = 294.30 g/mol. Mass of N = 28.02 g. %N = (28.02 / 294.30) × 100% = 9.52% ≈ 9.5%.

Hint

Mass percent = (mass of element in one mole / molar mass) × 100%.

Question Info

Course: CHM 101
Topic: CHM 101 Past Questions
Type: Objective
Difficulty: Not specified
Question 1678 of 1872
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