The molar mass of calcium bromide (CaBr2) is calculated by adding the molar masses of its constituent elements: calcium (Ca) and bromine (Br).
First, we need to identify the molar masses of each element:
- Calcium (Ca): approximately 40.08 g/mol
- Bromine (Br): approximately 79.90 g/mol
Since there are two bromine atoms in calcium bromide, we multiply the molar mass of bromine by 2:
Calculation:
- Molar mass of CaBr2 = Molar mass of Ca + 2 × Molar mass of Br
- Molar mass of CaBr2 = 40.08 g/mol + 2 × 79.90 g/mol
- Molar mass of CaBr2 = 40.08 g/mol + 159.80 g/mol
- Molar mass of CaBr2 = 199.88 g/mol
Therefore, the molar mass of calcium bromide, CaBr2, is approximately 199.88 g/mol.