Question

Question #48506

Answer 1

(b) `30%`

Explanation:

We're asked to find the percent by volume of ethanol in a `500 "mL"` solution containing `150 "mL"` of ethanol.

To find the percent by volume of a component, you divide the volume of the component by the total volume, and multiply by `100`:

`% = (V_"ethanol")/(V_"total") xx 100%`

Thus, the percent by volume of ethanol in this solution is

`(150 cancel("mL"))/(500cancel( "mL")) xx 100% = color(red)(30%`