A solution contains 40 g of common salt in 320 g of water. Calculate the concentration in terms of mass of mass percentage of the solution.

Explanation

To calculate the mass percentage of a solution containing 40 g of common salt in 320 g of water, follow these steps:

### Step 1: Identify the components of the solution
- **Solute**: Common salt (40 g)
- **Solvent**: Water (320 g)

### Step 2: Calculate the mass of the solution
The mass of the solution is the sum of the mass of the solute and the mass of the solvent.
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