To determine the molar mass of CHCl3 (chloroform), we will use the atomic masses of its constituent elements and multiply these masses by the number of each type of atom in the molecule.
1. Identify the atomic masses of the constituent elements:
- Carbon (C) has an atomic mass of 12.01 g/mol.
- Hydrogen (H) has an atomic mass of 1.01 g/mol.
- Chlorine (Cl) has an atomic mass of 35.45 g/mol.
2. Determine the number of each type of atom in a molecule of CHCl3:
- There is 1 atom of Carbon (C).
- There is 1 atom of Hydrogen (H).
- There are 3 atoms of Chlorine (Cl).
3. Calculate the contribution to the molar mass from each type of atom:
- The contribution from Carbon (C): [tex]\(1 \times 12.01 \, \text{g/mol} = 12.01 \, \text{g/mol}\)[/tex]
- The contribution from Hydrogen (H): [tex]\(1 \times 1.01 \, \text{g/mol} = 1.01 \, \text{g/mol}\)[/tex]
- The contribution from Chlorine (Cl): [tex]\(3 \times 35.45 \, \text{g/mol} = 106.35 \, \text{g/mol}\)[/tex]
4. Add the contributions from each type of atom to find the total molar mass of CHCl3:
- Total molar mass = 12.01 g/mol (C) + 1.01 g/mol (H) + 106.35 g/mol (Cl) = 119.37 g/mol
Therefore, the molar mass of CHCl3 is 119.37 g/mol.
