Question

B vitamins are a group of water soluble compounds that are important in cell metabolism. Each one has a different chemical structure. Please rank, in order of increasing molar mass, the following B vitamins listed below.
1. Vitamin B7,
biotin
C_10H_16N_ZO_3S
2. Vitamin B6,
pyridoxine
C_8H_11_NO_3
3. Vitamin B5
pantothenic acid
C_9H_17_NO_5
4. Vitamin B2, riboflavin
C_17H_20N_4O_6
5. Vitamin B1, thiamine
C_12_H_17N_4OS

Answer 1

Molar mass of vitamin B1, C12H17N4OS = 265.34 g/ mol

Molar mass of vitamin B2, C17H20N4O6 = 376.37 g/ mol

Molar mass of vitamin B5, C9H17NO5 = 219.24 g/ mol

Molar mass of vitamin B6, C8H11NO3 = 169.18 g/ mol

Molar mass of vitamin B7, C10H16N2O3S = 244.31 g/ mol

Now,

Order of increasing molar mass = B6 < B5 < B7 < B1 < B2