00:01
The empirical formula of a compound gives the simplest whole number ratio of the different atoms present in compound.
00:52
Let's assume, so let's assume we have 100 grams of the compound in which 25 .9 gram of nitrogen is present.
01:37
Molar mass of nitrogen, nitrogen that is 14 .01 gram per mole.
01:52
Molar mass of oxygen, it is 16 .0 gram per mole.
02:05
Moles of nitrogen, moles of nitrogen it is 25 .9 grams that is the mass given divided by molar mass that is 14 .01 gram per mole and it gives approximately 1 .848 mole then moles of oxygen.
02:35
So, here the mass 74 .1 gram divided by molar mass 16 .00 gram per mole and by solving it gives approximately 4 .631 mole.
02:53
Now the simplest, now simplest whole number ratio, whole number ratio by dividing, by dividing both moles by smallest number, by smallest number of moles, smallest number of mole.
03:33
So, smallest number is 1 .848...