00:01
So when automobiles burn gasoline, that gasoline is mostly octane.
00:05
So we're going to write a balanced equation for burning octane.
00:09
Okay, so we're going to start with c8h18, and we're going to add some oxygen to that.
00:18
And when we burn a hydrocarbon, we always make co2 in water.
00:24
So we'll go ahead and balance that with an 8 and a 9, and that gives us 25os on the right.
00:31
So 25 over 2 here, and we'll put heat over the arrow.
00:38
Then we'll go ahead and balance this by multiplying everything by 2 to get rid of that fraction.
00:46
25 oxygens, and we're going to burn that gasoline, of course.
00:57
So here is your balanced equation for burning octane.
01:03
So we're going to take a car trip that is 75 miles long.
01:08
Long and we're going to get 22 miles per gallon so i'm going to go ahead and change miles to gallons 22 miles per gallon since gallon is an in american kind of english unit we want to get over to liters so we'll have to look up that conversion and we find out that there's 3 .785 liters in a gallon okay and we've been given the density in grams per milliliter so i'm going to have to get this over to a milliliters.
01:43
I'm going to change liters to milliliters.
01:45
I've got a thousand milliliters in a liter...