Question

Molar concentration of $96g$ of $O_2$ contained in a $2L$ vessel is:

• A. $16mol/L$
• B. $1.5mol/L$
• C. $4mol/L$
• D. $24mol/L$

Answer 1

Answer: (B)

Molar concentration
$\frac{\text{ Mumber of moles of }{O}_{-}\{2\}}{\text{ volume (in litre) }}=\frac{96}{32}\times \frac{1}{2}=1.2molL$