00:01
Hello everyone my name is ahmad ali in this question we have the following formula c7 ms3 h5 or 6 from this formula we can calculate the molecular weight easily which will be 2 to 7 am u which we times 7 by 12 plus 3 times 14 plus 5 times 1 plus 6 times 16.
00:34
Then we want to calculate the percentage of each element.
00:38
So i will show the percentage of carbon, which is 7, it's a number, times by atomic mass of the carbon, which is 12, divided by the total molecular mass, which is 2 to 7 times by 100.
00:54
So the percentage of carbon is 36 .99 percentage.
01:00
Similar we can calculate the other which is a percentage of nitrogen is equal 18 .51 percentage which calculated it by times 3 by 14 and divided by the total mass then times by 100.
01:19
Similar the percentage of hydrogen we calculated it is 2 .2 percentage and the percentage of oxygen is equal 42 .29 percentage.
01:34
So if we have the total weight is one pound, so what is the mass of each one? so i will calculate it for carbon and it will be similar...