Calculate how many molecules are contained in 5 moles of CO2 and how much volume they occupy.

1. The number of molecules and their quantity are related by the ratio:

N = n * Na;

Na = 6.02 * 10 ^ 23 mol-1;

2.the number of carbon dioxide molecules will be:

N (CO2 molecules) = 5 * 6.02 * 10 ^ 23 = 3.01 * 10 ^ 24;

3.find the volume:

V = n * Vm;

V (CO2) = 5 * 22.4 = 784 dm3.

Answer: 3.01 * 1024 molecules occupy 784 dm3 by volume.