00:02
Hi there.
00:03
In this question, we are given the empirical formula of this compound, and we're told that the empirical formula is ch2.
00:12
Well, the empirical formula is the smallest whole number ratio of the elements in this compound.
00:25
We want to determine the molecular formula.
00:29
The molecular formula tells us exactly how many of each of these atoms is in the formula.
00:35
But the molecular formula needs to be in this same one to two.
00:40
Ratio.
00:41
So the molecular formula is going to be the empirical formula with some multiple of n.
01:00
So we're going to have a multiple of that empirical formula to the whole number n.
01:06
And to calculate n, what we need to do is to take the molar mass of the molecule, and that's given to us in the problem, and divide that by the empirical formula mass.
01:20
The empirical formula mass, since we have the empirical formula, we can calculate the empirical formula mass.
01:31
Okay, so let's go ahead and determine what n is.
01:34
In the question, they tell us that the molar mass of the compound is 112 .24 grams per mole.
01:46
To calculate the empirical formula mass, we will take one carbon, which is 12 .01...