Question

q.2. how many atoms of oxygen are represented in ba3(po4)2? a) 2 b) 4 c) 6 d) 8

Explanation:

Step1: Analyze oxygen sub - script

In the formula $Ba_3(PO_4)_2$, the sub - script of oxygen within the $(PO_4)$ group is 4.

Step2: Consider the outer coefficient

The outer coefficient of the $(PO_4)$ group is 2.

Step3: Calculate oxygen atoms

Multiply the sub - script of oxygen by the outer coefficient: $4\times2 = 8$.

Answer:

d) 8