Zero as you can not make a gallon of gasoline from water.
21 pounds.
Bio Diesel is made from soy beans. Ethanol is made from corn.
Currently a bushel of corn produces about 2.8 gallons of ethanol. With better varieties that figure will increase to 3 gallons. In the near future, the corn distillate will be processed again, yielding some more ethanol.
I AM NOT SURE ABOUT HOW MUCH SUGAR CANE IT TAKES, BUT IT TAKES A 5X7 AREA OF CORN TO PRODUCE 1 GAL OF ETHANOL.
Assuming the dry-milling method of ethanol production (the most common), one 56-pound bushel of corn makes 2.7 gallons of fuel ethanol and 17.4 pounds of dried distillers' grain. This means that 69% of the corn went into the ethanol.
it takes 1.5 gallons of fossil fuel to produce 1 gallon of ethanol.
For every gallon of gas containing 10% ethanol (referred to as E10 gas), it will contain 1/10th gallon of ethanol (about 12 ounces by volume). Ethanol is primarily used to oxygenate the gas and replace the chemical MBTE, which pollutes groundwater. HOWEVER, since most ethanol in the US comes from corn, it is important to note that using ethanol in gasoline causes GREATER pollution than just gasoline alone. This is because it actually takes more energy to produce corn based ethanol than is extracted from it. Until better technologies for ethanol production are available (e.g. algae), it is best for the environment to avoid gas containing ethanol if possible (some states mandate it).
As of 2011, approximately 45% of US corn production is being used for ethanol production.
couple hundred
The weight of one gallon of ethanol is 2.987 kilograms. This is equal to 2,987 grams or 6 pounds 9.352 ounces.
Expect around a 15% decline in fuel mileage over conventional gasoline. Ok, so if I'm paying $4.00 / gallon for 10 % ethanol gas and loosing 15 % mileage that means if I can find 100 % gasoline with no ethanol at $4.60 / gallon I'm getting basically the same thing. So if I pay $4.10 / gallon for real gas without ethanol, I just saved $.50 / gallon over the ethanol low output gas. This should make shopping allot easier, as long as the stations are required to post how much ethanol they are selling versus real gas.
Around 6 lbs. Depends on temperature and elevation.
Ethanol was almost certainly originally discovered through the accidental fermentation of improperly stored fruit or grain. Corn (maize) was unknown to Europeans until around the 15th century, but it was obviously a type of grain, and everybody knew by then you could make ethanol out of grain, so "corn ethanol" wasn't really "discovered" so much as "something everyone assumed to be true turned out to actually be true."