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  • Please help! - Some basic concepts in chemistry - JEE Main

What is the mass of an oxygen atom in amu if O = 2.6578\times 10^{-23} g

  • Option 1)

    16 µ

  • Option 2)

    18 µ

  • Option 3)

    17 µ

  • Option 4)

    15 µ

 

Answers (1)

best_answer

As we learnt in 

Atomic Mass Unit -

amu is used to measure mass of individual atoms.

- wherein

mass of one atom of Helium= 4 amu

Today, ‘amu’ has been replaced by ‘µ’ which is known as unified mass.

 

mass\;in\ \mu= \frac{2.6578\times 10^{-23}}{1.66056\times10^{-24}} \approx 16 \mu

 


Option 1)

16 µ

Correct

Option 2)

18 µ

Incorrect

Option 3)

17 µ

Incorrect

Option 4)

15 µ

Incorrect

Posted by

Plabita

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