Kasandra279 Kasandra279
  • 21-07-2014
  • Mathematics
Answered

How much pure alcohol must be added to 400 ml of a 15% solution to make its strength 32%



Answer :

pepe11
pepe11 pepe11
  • 21-07-2014
Quantity of alcohol =400*15/100 = 60ml
x is pure alcohol which must be added : (x + 60)/(x + 400) = 32/100
100x + 6000 = 32x + 12800 => 68x = 6800 => x = 100
100ml pure alcohol must be added
Answer Link

Other Questions

Facebook's initial IPO was $38 per share. Arianna purchased 616 shares. Assuming a cost of $7.00 to purchase the 616 shares, what was Arianna's total cost?
if 1 gallon of paint covers 400 sq feet, about how many gallons of paint are needed to paint the outside of a spherical tank of diameter 20 feet?
C= 1/2h(q+z) for q solve for q
what is a tribulatory
What is the percentage increase from 108.5 to 145.4
Dscribe the feelings of the narrator when he consulted medical dictionary in the british museum
What does Frederick Taylor mean by maximum prosperity?
in ancient times , coins made from gold and silver gradually replaced which commonly used means of exchange in commerce?
what is a tribulatory
The camera Melissa wanted for her birthday is on sale at 21% off the usual price. The amount of the discount is $79.80. What was the original price of the camer