Three identical flasks contain three different gases at standard temperature and pressure.Flask A contains Flask B contains O₃,and flask C contains F₂.Which flask contains the largest number of molecules? A)flask A B)flask B C)flask C D)All contain the same number of molecules.

Question

Quizplus · Accepted Answer

The number of molecules in a gas sample is proportional to its quantity measured in moles. According to the ideal gas law, at standard temperature and pressure, one mole of any gas occupies the same volume, which is 22.4 L. Thus, the quantity of gas in each flask can be calculated by dividing its volume by 22.4 L, as follows:

- Flask A: 11.0 L / 22.4 L/mol = 0.491 mol
- Flask B: 81.0 L / 22.4 L/mol = 3.62 mol
- Flask C: 72.0 L / 22.4 L/mol = 3.21 mol

Therefore, flask B contains the largest number of molecules, followed by flask C and flask A. However, all three flasks contain a different amount of gas molecules, so the correct answer is D, i.e., all contain the same number of molecules.

Three Identical Flasks Contain Three Different Gases at Standard Temperature