Percentage Composition
Easychemistry
What is the percentage of nitrogen by mass in ammonium nitrate (NH₄NO₃)?
Select the correct option:
Solution
Incorrect! Answer:
35%
- Calculate Molar Mass of NH4NO3:
- N×2=28
- H×4=4
- O×3=48
- Total Molar Mass =28+4+48=80 g/mol.
- Calculate Mass Percent of Nitrogen:
- %N=Total Molar MassTotal mass of N (2 atoms)×100
- %N=8028×100=35%.
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About This Question
- Subject
- chemistry
- Chapter
- some basic concepts in chemistry
- Topic
- percentage composition
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
35%
- Calculate Molar Mass of NH4NO3:
- N×2=28
- H×4=4
- O×3=48
- Total Molar Mass =28+4+48=80 g/mol.
- Calculate Mass Percent of Nitrogen:
- %N=Total Molar MassTotal mass of N (2 atoms)×100
- %N=8028×100=35%.
This easy difficulty chemistry question is from the chapter some basic concepts in chemistry, covering the topic of percentage composition. It appeared in the 2025 exam.
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