00:01
So in this question we're told that a carbon atom weighs 12 times what a hydrogen atom weighs.
00:06
So the mass of c is 12 times the mass of h.
00:10
And the mass of an oxygen atom is 16 times the mass of a hydrogen atom.
00:16
So glucose is c6h12 .06.
00:23
So the mass of glucose is 6 times the mass of carbon plus 12 times the mass of hydrogen plus 6 times the mass of oxygen, which is 6 times 12 plus 12 plus 6 times 16 or 180 times the mass of hydrogen.
00:46
So what is the ratio of the weights of the resulting elements? well, the carbon ratio, rc, is going to be the mass of carbon and glucose, so 6 times the mass of carbon divided by the mass of glucose, which is 6 times 12 times the mass of hydrogen divided by 180 times the mass of hydrogen, which is two -fifths.
01:10
So that's the ratio of carbon.
01:13
The ratio of hydrogen is going to be 12 times the mass of hydrogen divided by the mass of glucose...