Question

If $N_A$ is Avogadro's number, then the number of oxygen atoms in one gram equivalent of oxygen is:

• A. $N_A$
• B. $\frac{N_A}{2}$
• C. $\frac{N_A}{4}$
• D. $2\times N_A$

Answer 1

The correct option is B $\frac{N_A}{2}$

Since the valency of oxygen is -2, its gram equivalent weight will be 8g.

Number of oxygen atoms $=\frac{8}{16}\times N_A$ $=$ $\frac{N_A}{2}$.