Silver froms ccp lattice and `X`-ray studies of its crystals show that the edge length of its unit cell is `408.6` pm. Calculate the density of silver (atomic mass `= 107.9 u`).

Explanation

To calculate the density of silver given the edge length of its unit cell and its atomic mass, we can follow these steps:

### Step 1: Understand the structure
Silver (Ag) forms a cubic close-packed (CCP) lattice. In a CCP lattice, the number of atoms per unit cell (Z) is 4.

### Step 2: Convert the edge length to meters
The edge length of the unit cell is given as 408.6 pm (picometers). We need to convert this to meters for our calculations.

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