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

Explanation

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

### Step 1: Identify the mass of the solvent
The mass of the solvent (water) is given as:
- Mass of solvent = 320 g

### Step 2: Calculate the mass of the solution
The mass of the solution is the sum of the mass of the solute (common salt) and the mass of the solvent (water).
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