Three identical flasks contain three different gases at standard temperature and pressure.Flask A contains Ar,flask B contains Ne,flask C contains H₂.Which flask contains the largest number of molecules? A)flask A B)flask B C)flask C D)All flasks contain the same number of molecules.

Question

Quizplus · Accepted Answer

The number of molecules in a gas is directly proportional to its number of moles, which is given by the ideal gas law: n = PV/RT, where P is the pressure, V is the volume, R is the gas constant, and T is the temperature. Since all three gases are at the same temperature and pressure, and the flasks are identical, they have the same volume (V) and the same gas constant (R). Therefore, the number of molecules in each flask only depends on the number of moles (n) in each flask. Flask A, containing Ar, has one mole of gas, flask B, containing Ne, has one mole of gas, and flask C, containing H₂ (unknown gas), also has one mole of gas. Therefore, all flasks contain the same number of molecules.

Three Identical Flasks Contain Three Different Gases at Standard Temperature