Two substances, X and Y, can each serve as either solute or solvent depending on composition. Substance X has a molar mass of 50g mol−1, while substance Y has a molar mass of 150g mol−1. A simulation box shows 30 blue particles of X and 10 green particles of Y in the same volume. The mixture was prepared by combining 5.0g of each substance. Using only the information provided, determine which substance is acting as the solvent in the particulate diagram and explain your reasoning in no more than two sentences.