NEET Exam > NEET Questions > Which of the following has least mass?a)2 g-a...
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Which of the following has least mass?
- a)2 g-atom of nitrogen
- b)3X1023 atoms of C
- c)1 mole of S
- d)7.0 g of Ag
Correct answer is 'B'. Can you explain this answer?
Most Upvoted Answer
Which of the following has least mass?a)2 g-atom of nitrogenb)3X1023 a...
Explanation:
To find out the least mass among the given options, we need to calculate the mass of each option.
a) 2 g-atom of nitrogen:
The atomic mass of nitrogen is 14. So, the mass of 1 nitrogen atom is 14/6.022 x 10^23 g. Therefore, the mass of 2 g-atoms of nitrogen is 2 x 14/6.022 x 10^23 g = 4.651 x 10^-22 g.
b) 3x10^23 atoms of C:
The atomic mass of carbon is 12. So, the mass of 1 carbon atom is 12/6.022 x 10^23 g. Therefore, the mass of 3 x 10^23 atoms of carbon is 3 x 12/6.022 x 10^23 g = 5.972 x 10^-21 g.
c) 1 mole of S:
The molar mass of sulfur is 32 g/mol. Therefore, 1 mole of sulfur has a mass of 32 g.
d) 7.0 g of Ag:
The atomic mass of silver is 108. So, the mass of 1 silver atom is 108/6.022 x 10^23 g. Therefore, the mass of 7.0 g of silver is 7.0/108 x 6.022 x 10^23 = 3.953 x 10^22 atoms.
Conclusion:
Out of the given options, 3x10^23 atoms of C has the least mass (5.972 x 10^-21 g).
To find out the least mass among the given options, we need to calculate the mass of each option.
a) 2 g-atom of nitrogen:
The atomic mass of nitrogen is 14. So, the mass of 1 nitrogen atom is 14/6.022 x 10^23 g. Therefore, the mass of 2 g-atoms of nitrogen is 2 x 14/6.022 x 10^23 g = 4.651 x 10^-22 g.
b) 3x10^23 atoms of C:
The atomic mass of carbon is 12. So, the mass of 1 carbon atom is 12/6.022 x 10^23 g. Therefore, the mass of 3 x 10^23 atoms of carbon is 3 x 12/6.022 x 10^23 g = 5.972 x 10^-21 g.
c) 1 mole of S:
The molar mass of sulfur is 32 g/mol. Therefore, 1 mole of sulfur has a mass of 32 g.
d) 7.0 g of Ag:
The atomic mass of silver is 108. So, the mass of 1 silver atom is 108/6.022 x 10^23 g. Therefore, the mass of 7.0 g of silver is 7.0/108 x 6.022 x 10^23 = 3.953 x 10^22 atoms.
Conclusion:
Out of the given options, 3x10^23 atoms of C has the least mass (5.972 x 10^-21 g).
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Which of the following has least mass?a)2 g-atom of nitrogenb)3X1023 a...
I thought that th answer is d By converting all the given options in to no. Of Moles
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Which of the following has least mass?a)2 g-atom of nitrogenb)3X1023 atoms of Cc)1 mole of Sd)7.0 g of AgCorrect answer is 'B'. Can you explain this answer? for NEET 2025 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Which of the following has least mass?a)2 g-atom of nitrogenb)3X1023 atoms of Cc)1 mole of Sd)7.0 g of AgCorrect answer is 'B'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following has least mass?a)2 g-atom of nitrogenb)3X1023 atoms of Cc)1 mole of Sd)7.0 g of AgCorrect answer is 'B'. Can you explain this answer?.
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