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
• B. 46 N
• C. 23N
• D. 2.3 N

Answer 1

The correct option is B 46 N

The atomic number of nitrogen $\left(N\right)$ and oxygen $\left(O\right)$ are one half $\left(1/2\right)$ 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).