1 Unit: Chemical QuantitiesDay 4 - Notes Unit: Chemical Quantities Volume Conversions with the Mole Copyright © MsRazz ChemClass

2 After today, you will be able to…Calculate the volume of a gas at STP given the number of moles and vice versa Perform two step volume conversions (Ex: atoms to liters) Copyright © MsRazz ChemClass

3 Mole  Volume ConversionsFor one mole of any gas at STP, the volume occupied will be 22.4 liters. STP = standard temperature and pressure = 0 degrees Celsius and 1 atmosphere 1 mole gas = 22.4 L gas Copyright © MsRazz ChemClass

4 Example: How many moles of Helium gas will occupy a volume of 149Example: How many moles of Helium gas will occupy a volume of 149.3L at STP? K: 149.3L He U: ? mol He 149.3 L He 1 mol He . x = 6.665 mol He 22.4 L He 1 Copyright © MsRazz ChemClass

5 We have already learned…How to convert moles into particles and vice versa by using the conversion factor… 1 mole = 6.02x1023 atoms, molec. or F.U. How to convert moles into grams and vice versa by using the conversion factor… 1 mole = atomic mass in grams How to convert moles into liters and vice versa by using the conversion factor… 1 mole = 22.4 L Copyright © MsRazz ChemClass

6 Mole All Roads Lead to the MoleVOLUME 1 mole = liters Mole 1 mole = 6.02x1023 atoms, x1023 molecules, 6.02x1023 formula units PARTICLES 1 mole = (MM in) grams Use this to help you solve mole problems! MASS Copyright © MsRazz ChemClass

7 Example: What volume would 4Example: What volume would 4.32x1023 atoms of Krypton gas occupy at STP? K: 4.32x1023 atoms Kr U: ? L Kr 4.32x1023 atoms Kr 1 mol Kr 22.4 L Kr . x x = 1 6.02x1023 atoms Kr 1 mol Kr 16.1 L Kr Copyright © MsRazz ChemClass

8 Time to Practice! Complete WS4Copyright © MsRazz ChemClass