# What mass of solution containing 5.00% potassium iodide, #KI#, by mass contains 258 mg #KI#?

##### 1 Answer

#### Explanation:

Your goal here is to figure out the mass of your

As you know, a solution's **percent concentration by mass**, *parts of solute* you get **per** **parts of solution**.

In this case, you can say that a **for every** **of solution**.

You can thus use the solution's percent concentration as a **conversion factor** to figure out how many milligrams of solution would contain

#258 color(red)(cancel(color(black)("mg KI"))) * "100 mg solution"/(5.00color(red)(cancel(color(black)("mg KI")))) = color(green)(|bar(ul(color(white)(a/a)color(black)("5160 mg solution")color(white)(a/a)|)))#

The answer is rounded to three **sig figs**.