The general statement: "like dissolves like" means:

identical compounds will dissolve to form a solution.
one stronger component must beak down the weaker component.
liquids will only dissolve in liquids.
solid will dissolve in liquids.
the components of a solution must have similar physical properties

So what is the question?

how many grams of KCl must be used to prepare 400g of 5.00wt%solution?

The general statement "like dissolves like" means that the components of a solution must have similar physical properties. This implies that substances with similar chemical structures, polarity, or intermolecular forces are more likely to dissolve in each other. This principle is based on the idea that substances with similar properties can mix and form a homogeneous solution, while substances with different properties may not be able to mix or dissolve.

The general statement "like dissolves like" means that substances with similar chemical structures tend to dissolve in each other. In other words, substances that have similar polarity or solubility properties are more likely to dissolve in one another.

For example, polar substances like water tend to dissolve other polar substances such as salt or sugar because they can form strong electrostatic interactions with each other. Similarly, nonpolar substances like oil tend to dissolve other nonpolar substances because they have similar intermolecular forces.

So, out of the options you provided, the correct answer is: the components of a solution must have similar physical properties. This statement captures the idea that substances with similar chemical structures or properties are more likely to dissolve in each other.