10
QuizMultiple Choice

N/A — Exam

Question 10 • Chemistry

Which task most likely involves a calculation that uses moles?

Answer
A
finding the rate of expansion of a gas-filled balloon
B
determining the number of atoms in a jar of liquid
C
measuring a sugar sample on a balance
D
counting the number of jellybeans in a jar

Explanation

A mole is a counting unit used to relate the amount of a substance to the number of particles it contains. To determine the number of atoms in a jar of liquid, you could calculate the amount in moles and use Avogadro’s number to find the atoms. Measuring sugar directly uses mass, while counting jellybeans does not require moles.

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