Mole Concept and Some Basic Concepts of ChemistryhardMCQ SINGLE

Four exactly identical rigid flasks are separately filled with Hydrogen (), Helium (), Oxygen (), anMole Concept and Some Basic Concepts of Chemistry Chemistry Question

Question

Four exactly identical $1.0\text{ L}$ rigid flasks are separately filled with Hydrogen ($H_2$), Helium ($He$), Oxygen ($O_2$), and Ozone ($O_3$) gases at the exact same room temperature and pressure. According to Avogadro's hypothesis, what is the exact ratio of the total number of individual atoms present in the four flasks respectively?

Answer: B

💡 Solution & Explanation

Avogadro's hypothesis states that equal volumes of gases at the same temperature and pressure contain an equal number of molecules. Let each flask contain $n$ molecules. Atoms of $H_2 = 2n$; Atoms of $He = 1n$; Atoms of $O_2 = 2n$; Atoms of $O_3 = 3n$. The ratio of atoms is $2n : 1n : 2n : 3n = 2 : 1 : 2 : 3$.

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