Q. The number of molecules of ${CO}_{2}$ present in 44 g of ${CO}_{2}$ is
A) $6.0 \times 10^{23}$
B) $3 \times 10^{23}$
C) $12 \times 10^{23}$
D) $3 \times 10^{10}$
Explanation
(a)
1 mole=molecular mass in gram=6.02$\times 10^{23}$ molecules
Given mass of $CO_{2} = 44\ g$
Molecular mass of $CO_{2} = 12 + 16 \times 2 = 44$
$\therefore\ \ \ \ \ No.of\ molecules\ in\ 44\ g\ of\ CO_{2} = 6.02 \times 10^{23}\ \$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.