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QuizMultiple Choice

Molar Masses

Question 1 • LA-Chemistry A

How does the number of molecules in 1 mol of oxygen compare with the number of molecules in 1 mol of nitrogen?

Answer
A
1 mol of oxygen has fewer molecules.
B
1 mol of oxygen has more molecules.
C
Each sample has the same number of molecules.
D
The molecules cannot be compared without knowing the mass.

Explanation

A mole is a counting unit equal to Avogadro’s number of particles, about 6.02 × 10²³. Therefore, 1 mol of oxygen and 1 mol of nitrogen contain the same number of molecules, even if their masses differ.

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