Final answer:
The formula mass for calcium chloride (CaCl₂) is 110.98 amu; this is calculated by summing the mass of one calcium atom (40.08 amu) and the masses of two chlorine atoms (2 × 35.45 amu).
Step-by-step explanation:
The formula mass of calcium chloride (CaCl₂) can be calculated by adding the atomic masses of one calcium atom and two chlorine atoms. Here are the steps for calculating the formula mass of calcium chloride:
- Write down the atomic mass of calcium which is 40.08 amu.
- Write down the atomic mass of chlorine, which is 35.45 amu, but since there are two chlorine atoms in calcium chloride, you need to multiply this by 2.
- Add these values together to get the formula mass of calcium chloride: 40.08 amu (for calcium) + 35.45 amu (for one chlorine) × 2 = 110.98 amu for calcium chloride.
Thus, the formula mass for calcium chloride is 110.98 amu.