Question

question: 6 of 10 melting point: -7℃ boiling point: 79℃ nonmagnetic soluble in water z which statement correctly compares the substances? a. w and x are the same substances, but y and z are different substances. b. w and y are the same substances, but x and z are different substances. c. all four samples are from the same substance. d. all four samples are from different substances.

Explanation:

Substances are identified by unique physical properties like melting - point, boiling - point, magnetic properties and solubility. Since we don't have properties for W and X to compare with Y and Z, we assume based on the information given that different substances have different sets of properties. Without more data on W and X, we can't say they are the same as Y or Z.

Answer:

D. All four samples are from different substances.