1. 10.2 Mole-Mass and Mole- Volume Relationships 1 > Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved.. Chapter 10 Chemical Quantities 10.1 The Mole: A Measurement of Matter 10.2 Mole-Mass and Mole- Volume Relationships 10.3 Percent Composition and Chemical Formulas

2. 10.2 Mole-Mass and Mole- Volume Relationships 2 > Objectives: 1. Use molar mass to convert moles to grams and vice versa. Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved..

3. 10.2 Mole-Mass and Mole- Volume Relationships 3 > Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved.. The Mole-Mass Relationship Q: How do you convert the mass of a substance to the number of moles of the substance? A: Use the Molar Mass Luke The Mole-Mass Relationship

4. 10.2 Mole-Mass and Mole- Volume Relationships 4 > Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved.. The Mole-Mass Relationship molar mass = 1 mol, so: molar mass 1 mol molar mass and

5. 10.2 Mole-Mass and Mole- Volume Relationships 5 > Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved.. What is the mass, in grams, of 9.45 mol of aluminum oxide? Sample Problem 10.5 Converting Moles to Mass 9.45 mol Al 2 O 3 × 102.0 g Al 2 O 3 1 mol Al 2 O 3 = 964 g Al 2 O 3

6. 10.2 Mole-Mass and Mole- Volume Relationships 6 > Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved.. How many moles of iron(III) oxide are contained in 92.2 g of pure Fe 2 O 3 ? Converting Mass to Moles Sample Problem 10.6 92.2 g Fe 2 O 3 × 1 mol Fe 2 O 3 159.6 g Fe 2 O 3 = 0.578 mol Fe 2 O 3

7. 10.2 Mole-Mass and Mole- Volume Relationships 7 > Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved.. The Mole-Volume Relationship Objectives: 1.Explain how Avogadro’s hypothesis is used in mole-volume calculations. 2.Calculate Molar Volume of Gases. The Mole-Volume Relationship

8. 10.2 Mole-Mass and Mole- Volume Relationships 8 > Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved.. Volumes of one mole of different solid and liquid substances are not the same. The Mole-Volume Relationship

9. 10.2 Mole-Mass and Mole- Volume Relationships 9 > Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved.. Avogadro’s hypothesis Equal volumes of gases at the same temperature and pressure contain equal numbers of particles. The Mole-Volume Relationship Avogadro’s Hypothesis

10. 10.2 Mole-Mass and Mole- Volume Relationships 10 > Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved.. Whether the particles are large or small, large expanses of space exist between individual particles of gas. Avogadro’s Hypothesis The Mole-Volume Relationship

11. 10.2 Mole-Mass and Mole- Volume Relationships 11 > Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved.. The volume of a gas changes with a change in temperature or pressure. The Mole-Volume Relationship Avogadro’s Hypothesis Standard temperature and pressure (STP): 1. Temperature of 0°C 2. Pressure of 101.3 kPa, or 1 atmosphere (atm).

12. 10.2 Mole-Mass and Mole- Volume Relationships 12 > Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved.. At STP, 1 mol of gas = 22.4 L. 22.4 L = molar volume of a gas. The Mole-Volume Relationship Avogadro’s Hypothesis

13. 10.2 Mole-Mass and Mole- Volume Relationships 13 > Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved.. Calculating the Volume and Moles of a Gas at STP 22.4 L 1 mol 22.4 L and The Mole-Volume Relationship The conversion factors for these calculations are based on the relationship 22.4 L = 1 mol at STP.

14. 10.2 Mole-Mass and Mole- Volume Relationships 14 > Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved.. Determine the volume, in liters, of 0.60 mol SO 2 gas at STP. Sample Problem 10.7 Calculating Gas Quantities at STP 0.60 mol SO 2 × 22.4 L SO 2 1 mol SO 2 = 13 L SO 2

15. 10.2 Mole-Mass and Mole- Volume Relationships 15 > Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved.. Calculating Molar Mass and Density The Mole-Volume Relationship Different gases have different densities. Usually the density of a gas is measured in grams per liter (g/L) and at a specific temperature.

16. 10.2 Mole-Mass and Mole- Volume Relationships 16 > Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved.. The density of a gaseous compound containing carbon and oxygen is found to be 1.964 g/L at STP. What is the molar mass of the compound? Sample Problem 10.8 Calculating the Molar Mass of a Gas at STP

17. 10.2 Mole-Mass and Mole- Volume Relationships 17 > Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved.. Multiply the given density by the conversion factor. Sample Problem 10.8 = 44.0 g/mol 1.964 g 1 L 22.4 L 1 mol ×