Question

How many numbers of molecules of oxygen are present in 3 liters of CO2 at STP?

Answer 1

n other words there are 3/22.4 times the Avocado number CARBON DIOXIDE MOLECULES. The density of CO2 gas at STP = (44.01 g/mol) x (1 mol/22.4 L). So, in 3 liters there is 0,133928571* 2 moles of O atoms and 0,133928571 moles of C. atoms.