Class 9 Exam  >  Class 9 Questions  >  How many moles are present in 28g of nitrogen... Start Learning for Free
How many moles are present in 28g of nitrogen atoms?
  • a)
    1 mole
  • b)
    2.3 moles
  • c)
    0.5 mole
  • d)
    2 moles
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
How many moles are present in 28g of nitrogen atoms?a)1 moleb)2.3 mole...
The at.mass of nitrogen is 14g
and we know that at.mass of an element = 1 mole

so, 28g = 2mole
Free Test
Community Answer
How many moles are present in 28g of nitrogen atoms?a)1 moleb)2.3 mole...
Understanding Moles and Atomic Mass
In chemistry, a mole is a unit that measures the amount of a substance. It is based on the number of atoms or molecules and is defined as 6.022 x 10^23 particles. To find the number of moles in a given mass, we use the formula:
Number of moles = Mass (g) / Molar mass (g/mol)
Step 1: Determine the Molar Mass of Nitrogen
- The atomic mass of nitrogen (N) is approximately 14 g/mol.
- Since nitrogen exists as diatomic molecules (N2) in nature, the molar mass of N2 is 28 g/mol.
Step 2: Calculate the Number of Moles in 28g of Nitrogen
- Using the formula mentioned above:
- Given mass = 28 g
- Molar mass of nitrogen (N2) = 28 g/mol
- Plugging in the values:
- Number of moles = 28 g / 28 g/mol
- Number of moles = 1 mole
Step 3: Conclusion
- The calculation shows that there is 1 mole of nitrogen in 28 grams of nitrogen atoms (N2).
- Therefore, the correct answer is not option D but rather option A (1 mole).
Final Note
- Always remember to check whether you are working with atomic or molecular forms when calculating moles. For nitrogen, it is essential to consider it as N2 for accurate molar mass calculations.
Explore Courses for Class 9 exam

Top Courses for Class 9

How many moles are present in 28g of nitrogen atoms?a)1 moleb)2.3 molesc)0.5 moled)2 molesCorrect answer is option 'D'. Can you explain this answer?
Question Description
How many moles are present in 28g of nitrogen atoms?a)1 moleb)2.3 molesc)0.5 moled)2 molesCorrect answer is option 'D'. Can you explain this answer? for Class 9 2025 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about How many moles are present in 28g of nitrogen atoms?a)1 moleb)2.3 molesc)0.5 moled)2 molesCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 9 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for How many moles are present in 28g of nitrogen atoms?a)1 moleb)2.3 molesc)0.5 moled)2 molesCorrect answer is option 'D'. Can you explain this answer?.
Solutions for How many moles are present in 28g of nitrogen atoms?a)1 moleb)2.3 molesc)0.5 moled)2 molesCorrect answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 9. Download more important topics, notes, lectures and mock test series for Class 9 Exam by signing up for free.
Here you can find the meaning of How many moles are present in 28g of nitrogen atoms?a)1 moleb)2.3 molesc)0.5 moled)2 molesCorrect answer is option 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of How many moles are present in 28g of nitrogen atoms?a)1 moleb)2.3 molesc)0.5 moled)2 molesCorrect answer is option 'D'. Can you explain this answer?, a detailed solution for How many moles are present in 28g of nitrogen atoms?a)1 moleb)2.3 molesc)0.5 moled)2 molesCorrect answer is option 'D'. Can you explain this answer? has been provided alongside types of How many moles are present in 28g of nitrogen atoms?a)1 moleb)2.3 molesc)0.5 moled)2 molesCorrect answer is option 'D'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice How many moles are present in 28g of nitrogen atoms?a)1 moleb)2.3 molesc)0.5 moled)2 molesCorrect answer is option 'D'. Can you explain this answer? tests, examples and also practice Class 9 tests.
Explore Courses for Class 9 exam

Top Courses for Class 9

Explore Courses
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev