Why is density more useful than mass in identifying a mystery substance?

Question

A
Density is a more accurate measurement of mass

B
Mass changes based on the amount present, but density doesn’t

C
Density can be measured directly, while mass has to be calculated

D
Two objects can never have the same mass, but they can have the same density

Answer 1

The correct answer is:

B. Mass changes based on the amount present, but density doesn’t.

Density is defined as mass per unit volume (density = mass/volume). Therefore, it is an inherent property of a substance that does not change regardless of the amount present. This makes density a more reliable identifier for a mystery substance, as it allows for comparison based on a fundamental characteristic rather than an amount that can vary.