A compound `CuCl` has face `-` centred cubic structure. Its density is `3.4g cm^(-3)`. What is the length of unit cell ?

Explanation

To find the length of the unit cell for the compound CuCl with a face-centered cubic (FCC) structure and a given density of 3.4 g/cm³, we can follow these steps:

### Step 1: Understand the parameters
- The density (d) of CuCl is given as 3.4 g/cm³.
- The molar mass (M) of CuCl can be calculated as follows:
- Molar mass of Cu (Copper) = 63.5 g/mol
- Molar mass of Cl (Chlorine) = 35.5 g/mol
- Therefore, Molar mass of CuCl = 63.5 + 35.5 = 99 g/mol.
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