Question

Calculate the mass of chlorine gas contained in a 5.00 dm3 flask at 25°c and 98kPa pressure.

Answer 1

According to ideal gas law:

$\frac{m}{M}×RT=PV$

Find the mass:

$m = \frac{(M×P×V)}{(R×T)}$

$V = 0.005 m^3$

$T = 298 K$

$P = 98000 Pa$

$R = 8.314 Jmol^{-1}K^{-1}$

$M = 71 g/mol$

$m = \frac{(71×98000×0.005)}{(298×8.314) }= 14.04 g$