00:01
A lot of students, so in this question, you have to find the empirical formula and i have written the data over here.
00:07
So the data given is carbon, we have been given the percentage as for the mass.
00:12
It is 57 .8 % and hydrogen we are given with the mass percentage of 3 .6 % and oxygen is 38 .6%.
00:23
Right.
00:23
And you have to find out the empirical formula.
00:25
So what you should know about this is you should know about the atomic mass given, right? so the atomic mass of atomic mass.
00:37
Atomic mass of carbon is how much? atomic mass of carbon is 12.
00:41
And oxygen is how much oxygen is 1.
00:45
And we have of, sorry, oxygen is 16 and hydrogen is 1.
00:50
Right.
00:50
So now we can just take out the gram of the atoms or we can say the moles of atoms that are present over here.
00:57
So to find out the moles, to find out moles, what we will do? we will divide the percentage mass with atomic mass atomic mass okay so this is the first step to solve the question so we have if we see our carbon the carbon for carbon if we have to calculate if i'm writing it over for carbon is equal to percentage masses 57 .8 divided by how much was the atomic mass it was 12 so it will comes out to be 4 .5.
01:36
8 .2, right? similarly, if we talk about for hydrogen, it will be how much it is 3 .6 and divide by how much is the mass? it is 1.
01:48
So it will be 3 .6 only.
01:50
And that for the oxygen, we have how much mass percentage 38 .6 divided by how much is the mass? it is 16.
02:00
So this will comes out to be 2 .41.
02:04
All right.
02:04
So now we have our moles.
02:07
The second step we are going to do is, so the second step for this question will be to find out the molar ratio.
02:16
Okay, so find out the molar ratio and how we are going to find out the molar ratio.
02:23
We have a grams atom or we can say the moles.
02:25
So we can say moles divided by, so we can find out most divided by the number of the one, which is the least molar...