Some Basic Concepts Of Chemistry

Some amount of dichloromethane \(\left(\mathrm{CH}_{2} \mathrm{Cl}_{2}\right)\) is added to \(671.141 \mathrm{~mL}\) of chloroform \(\left(\mathrm{CHCl}_{3}\right)\) to prepare \(2.6 \times 10^{-3} \mathrm{M}\) solution of \(\mathrm{CH}_{2} \mathrm{Cl}_{2}(\mathrm{DCM})\). The concentration of \(\mathrm{DCM}\) is ___________ ppm (by mass).

Given :

atomic mass : C = 12

H = 1

Cl = 35.5

density of \(\mathrm{CHCl}_{3}=1.49 \mathrm{~g} \mathrm{~cm}^{-3}\)