Final answer:
A flaccid cell has less mass than a crisp cell due to the loss of water and dehydration.
Step-by-step explanation:
In a hypertonic solution, a flaccid cell has less mass compared to a crisp cell. A flaccid cell is one that has lost water and is in a dehydrated state, causing it to shrink and lose its turgidity.
On the other hand, a crisp cell is turgid and has taken in water, causing it to become swollen and firm. The mass of a cell is directly related to its water content, so a flaccid cell with less water will have less mass than a crisp cell.