00:01
The best way to figure this is using oxidation numbers.
00:03
Elements by themselves in their standard states have an oxidation state of zero.
00:09
Oxygen in a compound is usually negative 2, and then we can use the negative 2 from oxygen to figure out that nitrogen here must be plus 4.
00:19
So the nitrogen goes from 0 to plus 4, which means it was oxidized.
00:26
And the oxygen in 02 goes from 0 to negative 2, which means that it, was reduced.
00:37
For the next one, the carbon here has an oxidation state of plus two, and the oxygen has an oxidation state of minus two.
00:45
Hydrogen is by itself, so it's zero.
00:48
This hydrogen is in a compound, so it's plus four.
00:51
This one is also, i'm sorry, plus four total.
00:53
Each one of them is plus one.
00:56
This hydrogen is also plus one.
00:59
So since there is plus four total, the carbons must add up to negative four, so each one is negative 2 and then the oxygen is negative 2 in a compound.
01:10
So the carbon and carbon monoxide goes from plus 1 down to minus 2...