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Question

An oxide of nitrogen has a molecular weight 92.Find the total number of electrons in one gram mole of that oxide.


A
4.6 N
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B
46 N
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C
23N
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D
2.3 N
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Solution

The correct option is B 46 N
The atomic number of nitrogen $$(N)$$ and oxygen $$(O)$$ are one half $$(1/2)$$ their mass numbers.
$$\therefore$$  One molecule of compound having molecular weight of $$92$$ will contain $$46$$ electrons.
So, $$1gm$$ mole of molecule will contain $$46N$$ no. of electrons, where $$N$$ is the Avogadro Number.
Ans. will be (B).

Chemistry

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