Which contains more molecules, a mole of water or a mole of glucose?

Both, water and glucose contain the same molecules

Explanation:

Although one mole of glucose has more mass than one mole of water, if we refer to the amount of atoms (or molecules) it is known that 1 mole contains the number of Avogadro in particles. No matter if the molar mass is bigger or smaller, 1 mol of anything has always 6.02*10²³ particles