Answer:
Carbon, C= 10.052 %.
Hydrogen, H= 0.84 %.
Chlorine, Cl = 89.093 %.
Step-by-step explanation:
Important things to know about Chloroform: chloroform is also known as Trichloromethane(that is the IUPAC name), it has the chemical formula of CHCl₃, Density of 1.49 g/cm³ and molar mass of 119.38 g/mol.
So, What the question mean by percent composition by mass of Chloroform is that we need to calculate the the percent composition by mass of each elemental species in the compound.
Therefore, the percent composition by mass of Chloroform can be calculated with the mathematical representation below;
(mass mass of each element × number of moles of the elemet in the compound ÷ molar mass of the compound) × 100.
Carbon,C = with mass number of 12 g/mol.
=> [(12 × 1) / 119.38] × 100.
Carbon, C= 10.052 %.
HYDROGEN, H = with mass number of 1 g/mol.
=>( 1 /119.38 ) × 100.
Hydrogen, H= 0.84 %.
CHLORINE, Cl = with mass number of 35.453 g/mol.
Numbers of moles of the elemet in the compound = 3.
35.453 × 3 = 106.359
=>[ (35.453 × 3)/ 119.38] × 100.
Chlorine, Cl = 89.093 %.