How many molecules are in 4.5 L of CO2 at STP?

1 Answer
May 1, 2016

4.5L22.4Lmol1 × NA, where NA= Avogadro's number

Explanation:

We assume ideality, and recall that at STP 1 mole of ideal gas occupies a volume of 22.4L. We also know that NA= Avogadro's number = 6.02214×1023mol1

So 4.5L22.4Lmol1 × 6.02214×1023mol1 =

approx. 15×NA?

You can do the arithmetic.

How many atoms are there in this quantity?