Question

If 40 percent of a 20 gallon solution is alcohol,how many QUARTS of water must be added to make a new solution which is 25 percent alcohol?

Answer 1

we have a 40% alcohol solution so

0.40*20 = 8 gallons of alcohol in the 20 gallon solution

we know 8g of alcohol/20g of total solution = 40% solution of alcohol in solvent

so we set up the equation

25% = (8gallons of alcohol/x gallons of solvent)*100

0.25x = 8
x = 8/0.25
x = 32gallons

32gal - 20gal = 12gal

thus we need to add 12 gallons of water to dilute it just convert using google or wolframalpha

(seriously why aren't we using the metric system crazy americans)

Answer 2

bases ten is overrated

Answer 3

I would probably kill myself if a lab I worked in didnt use the metric system, seriously
1 ml of water = 1g of water so handy

Answer 4

well under the right conditions obviously :)

Answer 5

no one wanted to hear
28.35 grams of prevention is worth 453.6 grams of cure
or
her eyes are a blue million 1.609 kilometres

Answer 6

I wanted to hear :(

Answer 7

but in all seriousness what the are you blathering on about