Explanation: We have decane, the alkane with a chemical formula of C10H22 . The empirical formula of a substance has the smallest ratio between the elements its composed of. Here, we got the carbon to hydrogen ratio as 10:22 . So, we need to find the greatest common factor between the two numbers.
10=2*5
22=2*11
As you can see here, the greatest common factor between the two numbers is 2 , and so we divide both numbers by 2 . 10/2=5
