4
practice testMultiple Choice

Practice Test

Question 4 • Chemistry

Which statement best explains the purpose of using a mole in the measurement of matter?

Answer
A
It explains that substances with the same moles have the same mass.
B
It is used only for studying the properties of gases.
C
It allows chemists to deal with a large number of atoms.
D
It is commonly used as another unit of mass.

Explanation

A mole represents a very large number of particles: about 6.02 × 10²³ atoms, molecules, or other entities. Using this counting unit lets chemists measure and work with the enormous numbers of atoms found in ordinary samples. A mole is not a unit of mass, and equal amounts in moles do not necessarily have equal masses.

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