Question

Please rank, in order of smallest to largest molar mass, the following B vitamins listed below.

vitamin B7, biotin
C10H16N2O3S

Vitamin B2, riboflavin
C17H20N4O6

Vitamin B6, Pyridoxine
C8H11NO3

Vitamin B5, Pentothenic acid
C9H17NO5

Vitamin B1, thyamine
C12H17N4OS

Answer 1

Molar mass of $C_{10}H_{16}N_2O_3S =244.31g$

Molar mass of $C_{17}H_{20}N_4O_6=376.36g$

Molar mass of $C_8H_{11}NO_3=169.18g$

Molar mass of $C_9H_{17}NO_5=219.23g$

Molar mass of $C_{12}H_{17}N_4OS=265.3546g$

$C_8H_{11}NO_3<C_9H_{17}NO_5<C_{10}H_{16}N_2O_3S<C_{12}H_{17}N_4OS<C_{17}H_{20}N_4O_6$

(Answer)