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Question

Which of the following contains greatest number of oxygen atoms?

A
1 g of O
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B
1 g of O2
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C
1 g of O3
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D
All have the same number of atoms
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Solution

The correct option is D All have the same number of atoms
Number of moles=Mass in gramMolar mass

Number of moles =Number of particleNA
For option A
Moles of O atom=116

Number of O atom= NA16

For option B
Moles of O2=132

Moles of O atom=232

Number of O atom= NA16

For option C
Moles of O3= 148

Moles of O atom =348=116

Number of O atom=NA16

Hence all contain same number of atoms

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