puritatea = p% = Vpx100/Vip
=> Vp = Vioxp%/100 = 448x90/100 = 403,2 L
403,2 L ............................................................ V L
CH4 + 4Cl2 -[tex]-\frac{hv}{-4HCl}-[/tex]-> CCl4
22,4..................................................................... 22,4
=> V = 403,2x22,4/22,4 = 403,2 L la rand. de 100% dar noi avem 80%
=> randament = n = Vpracticx100/Vteoretic
=> Vpractic = Vteoret x 80/100 = 403,2x80/100 = 322,56 L CCl4