Question

a student measures some physical properties of different substances. the student’s observations are listed. substance g starts to become a liquid at 0°c. substance h has a mass of 28 g and a volume of 14 ml. substance i is a liquid that begins to change to a gas at 100°c. substance j floats in water at both 50 g and 30 g. which properties is the student using to classify the substances? a. g and h: boiling and melting point i and j: density b. g and i: boiling and melting point h and j: density c. i and j: boiling and melting point g and h: density d. h and j: boiling and melting point g and i: density

Explanation:

Substance G's change to liquid at 0°C is melting - point. Substance I's change to gas at 100°C is boiling - point. For substance H, density can be calculated from mass and volume. Substance J floating in water relates to density.

Answer:

B. G and I: boiling and melting point
H and J: density