Passage II

A teacher provided the table below to the students in a science class. The table gives 5 properties for each of Samples A-H. The students were told to assume that each sample is a completely solid cube composed of a single hypothetical pure substance.

The teacher asked each of 4 students to explain how these data could be used to predict which samples are composed of the same substance.

Student 1

If 2 samples have the same values for all 5 properties, they are composed of the same substance. If 2 samples have different values for any of the 5 properties, they are composed of different substances.

Student 2

If 2 samples have the same values for any 3 or more of the 5 properties, they are composed of the same substance. If 2 samples have the same values for fewer than 3 of the properties, they are composed of different substances.

Student 3

If 2 samples have the same mass, volume, and density, they are composed of the same substance. If 2 samples have different values for any of these 3 properties, they are composed of different substances. Neither melting point nor boiling paint, by itself, can distinguish between substances.

Student 4

If 2 samples have the same density, melting point, and boiling point, they are composed of the same substance. If 2 samples have different values for any of these 3 properties, they are composed of different substances. Neither mass nor volume, by itself, can distinguish between substances.

12. Consider the statement “Two samples that have the same mass, volume, density, and boiling point are composed of the same substance, even if the two samples have different melting points.” Which of Students 2 and 4, if either, would be likely to agree with this statement?

Answer and Explanation

Your Answer is

Correct Answer is F

Explanation

Because student 4 said that the melting point must be the same, so first exclude student 4; then see that student 2 only mentioned that any 3 properties are the same, so choose student 2 only