Question

Three identical flasks contain three different gases at standard temperature and pressure. Flask A contains C4H10, flask B contains SO2, and flask C contains He. Which flask contains the largest number of molecules?

Answer 1

Avagadro’s number is the number of molecules, atoms etc. present in 1 mole of a substance which equals 6.022 × 10²³

Therefore 1 mole of any Chemical substance will always contain 6.022 × 10²³ molecules, atoms etc.

In these question quantity of all the species present= 1 mole

1 mole SO₂

1 Mole C₄H₁₀

1 mole He

Therefore they all contain 6.022 × 10²³ molecules, atoms in case of Helium.

So, number of molecules is equal for all