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.
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.
3.2 ounces of chemical solution
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.
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.
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.
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.
3.2 ounces of chemical solution
19,000 gallons is equal to 2,432,000 ounces.
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.
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.
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.
80 US fluid ounces = 0.625 US gallons
2,000 ounces.
30 US gallons = 3840 US fluid ounces
1 gallon = 128 fluid ounces 9 gallons = 128 x 9 = 1152 fluid ounces
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.