SOLUTION: A chemist has a solution consisting of 5 ounces of propanol and 17 ounces of water. She would like to change the solution into a 40% propanol solution by adding z ounces of propa

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Question 256787: A chemist has a solution consisting of 5 ounces of propanol and 17 ounces of
water. She would like to change the solution into a 40% propanol solution by
adding z ounces of propanol. How many ounces of propanol should she add?

Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
%285%2Bx%29%2F%2817%2B5%2Bx%29=0.40
100%285%2Bx%29=40%2822%2Bx%29
500%2B100x=880%2B40x
60x=380
x=38%2F6=19%2F3
She needs to add 19/3 ounces of propanol.