21 ounces to 100 gallons of water means (21/100) = 0.21 ounce per gallon of water.
The proper amount of chemical is only 0.16% of the amount of water it goes into. It's hard to get the correct concentration for small batches.
This is probably why they give you the instructions in terms of 100 gallons ... it would be tough to measure 0.21 ounces accurately.
To calculate the amount of chemical needed per gallon, first determine the total amount of chemical in the 5 gallons of water. Since 16 ounces in 5 gallons equal 500 ppm, you can set up a proportion: (16 ounces/5 gallons) = (x ounces/1 gallon). Solve for x to find out how many ounces of chemical are needed per gallon.
An ounce is a unit of weight which is approximately equal to 28 grams. One gallon is equal to 128 ounces so there are 640 ounces in 5 gallons of water.
The ratio is "one to 99", or "one part per hundred", regardless of the size of the sample. If you only want to prepare one gallon of mixture, you add (1% of one gallon) of chemical to (99% of 1 gallon) of water. 1 gallon = 128 fluid ounces Chemical = 0.01 x 128 = 1.28 fluid ounce Water = 0.99 x 128 = 126.72 fluid ounces Together, you have (1.28 + 126.72) = 128 fluid ounces = 1 gallon.
12800 ounces. 1 gallon makes 128 ounces and 1 ounce is 0.0078 gallon in U.S measure. There are 8 ounces in a cup, 2 cups in a pint, 2 pints in a quart and 4 quarts in a gallon. That makes 128 ounces in a gallon US. In UK 20 ounces to the pint, 8 pints to the gallon which makes 160 ounces Imrerial measure.
100 (US) gallons water = 378.541178 litres = 378.541178 kg = 13,352.65 ounces > 100 (UK) gallons water = 454.609 litres = 454.609 kg = 16,035.86 ounces > For liquids other than water, multiply answers by specific gravity of liquid.
To calculate the amount of chemical needed per gallon, first determine the total amount of chemical in the 5 gallons of water. Since 16 ounces in 5 gallons equal 500 ppm, you can set up a proportion: (16 ounces/5 gallons) = (x ounces/1 gallon). Solve for x to find out how many ounces of chemical are needed per gallon.
16 gallons is 2,048 ounces @128 fluid ounces per gallon.
An ounce is a unit of weight which is approximately equal to 28 grams. One gallon is equal to 128 ounces so there are 640 ounces in 5 gallons of water.
The ratio is "one to 99", or "one part per hundred", regardless of the size of the sample. If you only want to prepare one gallon of mixture, you add (1% of one gallon) of chemical to (99% of 1 gallon) of water. 1 gallon = 128 fluid ounces Chemical = 0.01 x 128 = 1.28 fluid ounce Water = 0.99 x 128 = 126.72 fluid ounces Together, you have (1.28 + 126.72) = 128 fluid ounces = 1 gallon.
12800 ounces. 1 gallon makes 128 ounces and 1 ounce is 0.0078 gallon in U.S measure. There are 8 ounces in a cup, 2 cups in a pint, 2 pints in a quart and 4 quarts in a gallon. That makes 128 ounces in a gallon US. In UK 20 ounces to the pint, 8 pints to the gallon which makes 160 ounces Imrerial measure.
100 (US) gallons water = 378.541178 litres = 378.541178 kg = 13,352.65 ounces > 100 (UK) gallons water = 454.609 litres = 454.609 kg = 16,035.86 ounces > For liquids other than water, multiply answers by specific gravity of liquid.
19,000 gallons of water weighs about 158,650 pounds (@8.35 lbs/gallon).
9 gal 1 gallon makes 128 ounces and 1 ounce is 0.0078 gallon in U.S measure. There are 8 ounces in a cup, 2 cups in a pint, 2 pints in a quart and 4 quarts in a gallon. That makes 128 ounces in a gallon US. In UK 20 ounces to the pint, 8 pints to the gallon which makes 160 ounces Imperial measure.
80 US fluid ounces = 0.625 US gallons
1.5 Imperial gallons = 240 Imperial fluid ounces 1.5 US gallons = 192 US fluid ounces
0.81 gal 1 gallon makes 128 ounces and 1 ounce is 0.0078 gallon in U.S measure. There are 8 ounces in a cup, 2 cups in a pint, 2 pints in a quart and 4 quarts in a gallon. That makes 128 ounces in a gallon US. In UK 20 ounces to the pint, 8 pints to the gallon which makes 160 ounces Imperial measure.
2,000 ounces.