The molar mass of copper(II) chloride (CuCl2) can be determined by adding the atomic masses of its constituent elements. Copper (Cu) has an atomic mass of approximately 63.55 g/mol, while chlorine (Cl) has an atomic mass of about 35.45 g/mol. Since there are two chlorine atoms in CuCl2, we will multiply the atomic mass of chlorine by 2.
The calculation is as follows:
- Molar mass of Cu = 63.55 g/mol
- Molar mass of Cl = 35.45 g/mol × 2 = 70.90 g/mol
Now, adding these together:
63.55 g/mol + 70.90 g/mol = 134.45 g/mol
Therefore, the molar mass of CuCl2 is approximately 134.45 g/mol.