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Abundance and Isotopes

How many oxyg...

Question

How many oxygen atoms are present in 2 gram-atoms of $O$ ?

A

12.044 \times 10^{23}

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B

2.26 \times 10^{23}

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C

3.011 \times 10^{23}

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D

6.022 \times 10^{23}

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Solution

The correct option is A $12.044 \times 10^{23}$
1 gram atom of $O = 6.022 \times 10^{23}$ atoms of $O$
So, 2 gram atoms of $O = 2 \times 6.022 \times 10^{23}$ atoms of $O$
$= 12.044 \times 10^{23}$ atoms of $O$

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Abundance and Isotopes

Standard XII Chemistry

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