Question

The number of oxygen atoms in $2$ moles of Plaster of Paris (P.O.P.) is

• A. $4.5N_0$
• B. $10N_0$
• C. $4N_0$
• D. $8N_0$

Answer 1

Answer: (A)

P.O.P is $CaS{O}_4$ $.\frac{1}{2}{H}_{2}O$
$1$ mol of P.O.P. contains $=4.5N_0$ oxygen atoms