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  • Stuck here, help me understand: What are the number of molecules in 16 g of Oxygen?

What are the number of molecules in 16 g of Oxygen?

  • Option 1)

    12.044 \times 10^{23}

  • Option 2)

    6.022 \times 10^{23}

  • Option 3)

    9.066 \times 10^{23}

  • Option 4)

    3.011 \times 10^{23}

 

Answers (1)

best_answer

As we learnt  in

Mole Concept -

One mole is the amount of a substance that contains as many particles or entities as there are atoms in exactly 12 g (or 0.012 kg) of the 12C isotope.

- wherein

one mole = 6.0221367 X 1023   

 

 

 Mass of one mole oxygen  = 32 g

Number of molecules = \frac{1}{2} \times 6.022\times10^{23} = 3.011 \times10^{23}

 


Option 1)

12.044 \times 10^{23}

Incorrect

Option 2)

6.022 \times 10^{23}

Incorrect

Option 3)

9.066 \times 10^{23}

Incorrect

Option 4)

3.011 \times 10^{23}

Correct

Posted by

Aadil

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