Question

What is the number of molecules in 2.24L of SO2 at STP?

(a) 6.023*10^23

(b) 6.023*10^22

(c) 6.023*10^20

(d) 6.023*10^21

This question was addressed to me by my college professor while I was bunking the class.

Query is from Kinetic Theory topic in chapter Kinetic Theory of Physics – Class 11

Answer 1

The correct answer is (b) 6.023*10^22

Easiest explanation: According to Avogadro’s law 22.4L of any gas at STP is 6.023*10^23.

So, in 2.24L there will be 6.023*10^23/10

= 6.023*10^22.