Calculate the formula unit mass of `CaCl_(2)`.

Explanation

To calculate the formula unit mass of \( \text{CaCl}_2 \), follow these steps:

### Step 1: Identify the atomic masses of the elements
- The atomic mass of Calcium (Ca) is approximately 40 U.
- The atomic mass of Chlorine (Cl) is approximately 35.5 U.

### Step 2: Determine the number of atoms in the formula
In \( \text{CaCl}_2 \):
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