How many molecules are there in a sample of an ideal gas with a volume of 1.66 L at STP?

Answer 1

One mole of any gas at STP will occupy 22.4 L, and it means 1 mole = 22.4 L

and also 1 mole = 6.02 x 10²³ molecules

The calculation is:

1.66 L x 1.0 mol/ 22.4 L x (6.02 x 10²³) molecules / 1.0 mol = 4.46 x 10 ²² molecules