lots
One teaspoon of bleach is used to disinfect five gallons of water. Therefore, 105.6 teaspoons of bleach would be used to disinfect 528 gallons of water.
Let's say about 30 gallons.
I'm not sure of the exact amount, but I know you would need ALOT of money to buy that much bleach.
0.4 gallons
A one percent solution means 1 part beach and 99 parts water. So we can answer the question by solving the equation 1 part bleach/99 parts water=x gallons bleach/20 gallons water. You can cross multiply. This is the same as 99x=20 so x=20/99 or .20 Let's check .20 gallons bleach/ 20 gallons water=.01 which is 1% .2 gallons is the same as 3.2 cups or 25.6 fluid oz.
Ratio of Clorox Bleach to Water for Purification2 drops of Regular Clorox Bleach per quart of water8 drops of Regular Clorox Bleach per gallon of water1/2 teaspoon Regular Clorox Bleach per five gallons of waterIf water is cloudy, double the recommended dosages of Clorox Bleach this answer was found here: http://www.csgnetwork.com/h2oemergencypurifycalc.html
2000 to 5000 gallons
Using regular chlorine bleach (5% solution) at a rate of 6.5 ounces of bleach per 1000 gallons of water gives a chlorination level of 2ppm per 1000 gallons. To get the rate for 2500 gallons, multiply 6.5 by 2 to get 13 ounces for 2000 gallons, then divide 6.5 by 2 to get 3.25 ounces (the amount of bleach needed to treat 500 gallons) and add that to the 13 ounces to get a total of 16.25 ounces of chlorine bleach per 2500 gallons of waterat a level of 2ppm.For a swimming pool, you would likely want a 3ppm chlorine to water ratio (24.375 ounces bleach per 2500 gallons water).
20 gallons
2000 gallons.
7x/10 (That's 7/10 times x). So if x = 10 gallons, then there are 7 gallons of bleach in the solution. (7gal/10gal = 0.70 = 70%). This answer if correct if the percentage is by volume. Otherwise, the question can not be answered without knowledge of the basis of the percentage.