00:01
In this question, we're given a chemical equation shown here, and we're asked to determine what coefficient needs to go in each of the two blank spots in order to balance this chemical equation.
00:12
Based off the principle that matter can neither be created nor destroyed, we know that the number of each type of atom in the product side needs to match the number of each type of atom in the reactant side.
00:27
On the reactants side, we have six carbons total, 12 hydrogen's total, and six oxygens total.
00:38
So that's what we need to end up with total on the product side.
00:45
So i would start with hydrogen because looking at our two molecules here on the product side, only one of them has hydrogen.
00:55
So that'll make that a little bit easier.
00:57
So on the reactant side, we know that we start with 12 hydrogen atoms.
01:06
On the product side, our molecule currently has 6 hydrogen atoms.
01:13
So we need to think what can we multiply 6 by in order to get 12.
01:18
So that will be 2 because 6 times 12 equals, excuse me, 6 times 2 equals 12.
01:30
And we know that this coefficient then has to be a 2.
01:34
Because we need there to be 12 hydrogen atoms on the product side.
01:40
And this is the only molecule that has hydrogen atoms for us to work with.
01:46
So that gives us 12 hydrogens.
01:52
Now we can look at how many carbon and oxygen atoms we have to work with in order to get us to the six we need to have because we have six each of carbon and oxygen on the reactant side.
02:08
So since we put a 2 for our first coefficient blank, that means we need to multiply the number of each type of atom in this molecule times 2.
02:24
So for carbon, 2 times 2 will give us 4, and then for oxygen, 2 times 1 will give us 2.
02:41
So to determine then what the coefficient needs to be for the second product, we can think well, let's look at carbon...