What is the molar mass of CaCl_2?

• A. 40.08 g/mol
• B. 110.98 g/mol
• C. 75.53 g/mol
• D. 147.01 g/mol

Answer: (C)

Verified step by step guidance

1. Identify the chemical formula of the compound, which is CaCl\_2, meaning it contains 1 calcium (Ca) atom and 2 chlorine (Cl) atoms.
2. Find the atomic masses of each element from the periodic table: calcium (Ca) has an atomic mass of approximately 40.08 g/mol, and chlorine (Cl) has an atomic mass of approximately 35.45 g/mol.
3. Calculate the total mass contributed by calcium by multiplying the number of calcium atoms by its atomic mass: 1 \times 40.08 g/mol.
4. Calculate the total mass contributed by chlorine by multiplying the number of chlorine atoms by its atomic mass: 2 \times 35.45 g/mol.
5. Add the masses of calcium and chlorine together to find the molar mass of CaCl\_2: (1 \times 40.08) + (2 \times 35.45) g/mol.