One mole (mol) of a substance is
A) the molecular mass of the substance expressed in kilograms.
B) 1 g of the substance dissolved in 1 L of solution.
C) the largest amount of the substance that can be dissolved in 1 L of solution.
D) the molecular mass of the substance expressed in grams AND 6.02 × 10^23 molecules of the substance
E) 6.02 × 10^28 molecules of the substance. (^ means 'to the power of')