Question

At S.T.P. the density of $CC{l}_4$ vapours in g/L will be nearest to :

• A. 5.63
• B. 6.87
• C. 23
• D. 2.34

Answer 1

Answer: (B)

6.87

According to avogadro's law, 1 mole of every substance occupy 22.4 Liters at STP and weighs equal to its molecular mass.

Thus mass of at STP $=154g$

Volume occupied by at STP $=22.4L$

Density is defined as the mass contained per unit volume.

Density $=\frac{mass}{volume}\frac{154}{22.4}=6.875g/L$