What is the molar mass of strontium chloride (SrCl_2)?

• A. 87.62 g/mol
• B. 121.63 g/mol
• C. 158.53 g/mol
• D. 197.33 g/mol

Answer: (C)

Verified step by step guidance

1. Identify the chemical formula of strontium chloride, which is \(\mathrm{SrCl_2}\), meaning it contains one strontium (Sr) atom and two chlorine (Cl) atoms.
2. Find the atomic masses of each element from the periodic table: strontium (Sr) has an atomic mass of approximately 87.62 g/mol, and chlorine (Cl) has an atomic mass of approximately 35.45 g/mol.
3. Calculate the total mass contributed by chlorine atoms by multiplying the atomic mass of chlorine by 2 (since there are two chlorine atoms): \$2 \times 35.45$ g/mol.
4. Add the atomic mass of strontium to the total mass of chlorine atoms to get the molar mass of strontium chloride: \$87.62 + (2 \times 35.45)$ g/mol.
5. Sum these values to find the molar mass of \(\mathrm{SrCl_2}\), which represents the mass of one mole of strontium chloride molecules.