4
practice testMultiple Choice

Practice Test

Question 4 • Chemistry

The gases listed are at standard temperature and pressure: 1 mol of CO sub 2 gas 1 mol of cap n sub 2 gas 2 mol of cap o sub 2 gas Which statement is correct?

Answer
A
The volumes of 2 mol of cap o sub 2 and 1 mol of cap n sub 2 gases are the same.
B
The volumes of 1 mol of CO sub 2 and 1 mol of cap n sub 2 gases are the same.
C
The volume of 1 mol of CO sub 2 is greater than that of 1 mol of cap n sub 2 .
D
The volume of 1 mol of CO sub 2 is greater than that of 2 mol of cap o sub 2 .

Explanation

At the same temperature and pressure, equal amounts in moles of gases occupy equal volumes (Avogadro’s law). Therefore, 1 mol of CO₂ and 1 mol of N₂ have the same volume, so choice B is correct. Two moles of O₂ occupy twice the volume of 1 mol, not the same volume.

AI-written and checked against the verified answer.

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