Glucose molecule: C6H12O6
Atomic weight of Carbon = 12
Glucose contains 6 carbon atoms
Hence 6 x 12= 72
Atomic weight of Hydrogen is 1
Glucose contains 12 Hydrogen atoms
Hence 1 x 12=12
Atomic weight of Oxygen is 16
Glucose contains 6 oxygen atoms
Hence 6 x 16= 96
Molecular mass of glucose= Sum of atomic weight of all atom
=Atomic weight of 6 Carbon atoms + Atomic weight of 12 Hydrogen atoms + Atomic weight of 6 Oxygen atoms
= 72 + 12+ 96= 180
Therefore, Molecular mass of glucose is 180g/mol