00:01
Hi everyone in this question a sample was analyzed and found to contain 40 % carbon 6 .71 % hydrogen and 53 .29 % oxygen.
00:12
So if the molecular weight of the compound is 180 .16 gram per more, so what is the molecular formula of the compound? so in order to find the molecular formula, let us first find the empirical formula of the compound.
00:27
So to find the empirical formula, let us make the following table.
00:31
So let 100 gram of the compound.
00:34
So here we are given the element, carbon, hydrogen and oxygen and their percentage.
00:41
And if we suppose 100 gram of the compound, then we can say carbon is 40 gram, hydrogen is 6 .71 gram and oxygen 53 .29 gram.
00:51
So atomic masses of carbon 12, hydrogen 1 and oxygen, that is 16.
00:56
So let us find out the number of molds that is equal to given mass, divide by molar mass.
01:02
So, 40 divide by 12, so which we get 3 .33.
01:07
So similarly, for hydrogen, 6 .71, and for oxygen, 3 .33.
01:12
So let us find the simplest mold ratio.
01:16
So 3 .33 divide by 3 .33, because the smallest among these molds, that is 3 .33 value.
01:25
So therefore, the carbon that is equal to one, hydrogen that is equal to 2, and oxygen that is equal to 1.
01:32
That means the empirical formula of the compound contain one carbon atom, two hydrogen atom and one oxygen atom.
01:38
So this is the empirical formula of the compound...