Tobacco contains a poisonous alkaloid called Nicotine. The molecular formula ofnicotine is C10H14N2 (molar mass = 162.23g). The mass percentage of nitrogen innicotine, is?
Correct answer: D. 17.3%
- A. 4.32%
- B. 8.23%
- C. 12.4%
- D. 17.3%
Explanation
The mass percentage of nitrogen in nicotine can be calculated as follows:Calculate the molar mass of nicotine:Molar mass of nicotine=10×12.01+14×1.01+2×14.01=162.23 g/molCalculate the mass of nitrogen in one mole of nicotine:Mass of nitrogen=2×14.01=28.02 g/molCalculate the mass percentage of nitrogen in nicotine:Mass percentage of nitrogen = Mass of nitrogen Molar mass of nicotine ×100% = 28.02162.23 ×100% ≈ 17.3% Therefore, the answer to your question is d. 17.3%.
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