MDCAT Chemistry MCQ #3938

A sample of urea [CO(NH2)2] is analyzed for its nitrogen content. What is the mass percentage of nitrogen in pure urea?

MDCAT Chemistry MCQ #3938

  1. Question 1

    Q1. A sample of urea [CO(NH2)2] is analyzed for its nitrogen content. What is the mass percentage of nitrogen in pure urea?

    • A) 23.3%
    • B) 28.0%
    • C) 60.0%
    • D) 46.6%

    Answer: 46.6%

    Explanation: Urea contains two nitrogen atoms (28g) in 60g total. 23.3% is wrong because it counts only one nitrogen atom.