Some students used a variety of procedures to investigate four liquid samples. The students recorded the following information.
• When Sample W was cooled, solid particles settled out of the liquid.
• The mass and volume of Sample X were measured, and the density of Sample X was
calculated to be 1.6 g/mL.
• Sample Y was heated, and the temperature was recorded. All the liquid boiled away at
the same temperature and left no residue in the container.
• When a dilute acid was added to Sample Z, gas bubbles formed and rapidly rose to the
surface of the liquid.