00:01
In this question, we're balancing three combustion reactions.
00:04
The first combustion reaction is octane.
00:07
Octane is c8, h -18, which will combine with oxygen to produce carbon dioxide and water.
00:15
We have eight carbons, so we need eight carbons.
00:17
We'll put an eight in front of carbon dioxide.
00:19
We have 18 hydrogens.
00:22
We have two here, so we need to put a nine in front of the water.
00:26
Now we have nine plus 16.
00:29
That gives us 25 oxygens.
00:31
How do we get 25 out of 2? we multiply the 2 by 25 halves.
00:36
Now to get rid of the fraction, we multiply everything through by 2...