Question

How many molecule are present in $12 \,L$ of liquid $CCl_4$? The density of the liquid is $1.59 \,g \,cm^{-3}$?

• A. $7.44 \times 10^{26}$
• B. $0.744 \times 10^{26}$
• C. $1.59 \times 10^{26}$
• D. $15.9 \times 10^{26}$

Answer 1

Answer: (B)

$1\, cc$ of $CCl_4$ contains $1.59\,g$ of it $= \frac{1.59}{1.58}$
$\therefore 12\,L$ of liquid $CCl_4$ will contain
$= 12 \times 1000 \times 0.0103$
$\Rightarrow 0.744\times 10^{26}$ moles of it