Question #48506

1 Answer
May 25, 2017

Answer:

(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%#