How much of a substance is contained in 36 g of glucose?

Given:
m (C6H12O6) = 36 g.

To find:
n (C6H12O6) -?

Decision:
If we know the mass of a substance, then its amount can be found by the formula n = m / M (Where n is the amount of the substance, m is the mass of the substance, M is the molar mass of the substance).
Molar mass (M) of glucose (C6H12O6) = 180 g / mol.
Now we substitute the known to the formula for finding the amount of substance.
n (C6H12O6) = 36 g / 180 g / mol.
n (C6H12O6) = 0.2 mol.

Answer: n (C6H12O6) = 0.2 mol.