How many molecules are present in one mole of glucose, C6H12O6?

a) 6.92 ×10–26

b) 3.34 × 1021

c) 6.02 × 1023

d) 1.44 × 1025

The correct answer is c) 6.02 × 10^23 molecules. This is because one mole of any substance contains Avogadro's number of particles, which is approximately 6.02 × 10^23.