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 Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. .

The Mole-Mass Relationship Do Now: How many atoms are in 10.2 moles of Vanadium? How many moles of Calcium are in 4.88 x 1023 atoms of Calcium? What is the mass of one mole of Iodine? What is the molar mass of C2H6? What is the molar mass of Mg(NO2)2? Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. .

The Mole-Mass Relationship Molar mass is used to convert between mass and moles. molar mass = 1 mol molar mass 1 mol and Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. .

Converting Moles to Mass Sample Problem 10.5 Converting Moles to Mass 1. What is the mass, in grams, of 2.1 moles of Al? 2. What is the mass, in grams of 2.1 moles of AlCl3 Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. .

Converting Moles to Mass Sample Problem 10.5 Converting Moles to Mass 1. What is the mass, in grams, of 2.1 moles of Al? 57 g 2. What is the mass, in grams of 2.1 moles of AlCl3 280 g Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. .

Converting Mass to Moles Sample Problem 10.6 Converting Mass to Moles How many moles are in 0.37 g of boron? How many moles are in 75 g of dinitrogen trioxide? Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. .

Converting Mass to Moles Sample Problem 10.6 Converting Mass to Moles How many moles are in 0.37 g of boron? 3.4 x 10-2 mol B How many moles are in 75 g of dinitrogen trioxide? 0.99 mol N2O3 Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. .

The Mole-Mass Relationship Do Now: How many moles of NaCl are in 100. grams of NaCl? How many molecules of CO2 are in 100. grams of CO2? Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. .

The Mole-Volume Relationship Avogadro’s Hypothesis At standard temperature and pressure (STP), 1 mol of any gas occupies 22.4 L. 22.4 L is the molar volume of a gas. Standard temperature and pressure (STP) 0°C and 101.3 kPa, or 1 atmosphere (atm). Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. .

The Mole-Mass Relationship Molar volume of a gas can be used to convert between volume and moles. molar volume of a gas = 22.4 L = 1 mol 22.4 L 1 mol and Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. .

The Mole-Volume Relationship Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. .

Calculating Gas Quantities at STP Sample Problem 10.7 Calculating Gas Quantities at STP Determine the volume, in liters, of 3.7 mol N2 gas at STP. Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. .

Calculating Gas Quantities at STP Sample Problem 10.7 Calculating Gas Quantities at STP Determine the volume, in liters, of 3.7 mol N2 gas at STP. 82.9 L N2 Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. .

Calculating Gas Quantities at STP Sample Problem 10.7 Calculating Gas Quantities at STP Determine the number of moles in 67.2 L SO2, at STP. Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. .

Calculating Gas Quantities at STP Sample Problem 10.7 Calculating Gas Quantities at STP Determine the number of moles in 67.2 L SO2, at STP. 3.0 mol SO2 Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. .

The Mole-Volume Relationship Calculating Molar Mass and Density Density and molar volume at STP (22.4 L/mol) can be used to calculate molar mass of a gas. Molar mass = Density * Molar Volume Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. .

Calculating the Molar Mass of a Gas at STP Sample Problem 10.8 Calculating the Molar Mass of a Gas at STP A gaseous compound containing sulfur and oxygen has a density of 3.58 g/L at STP. What is the molar mass of the compound? Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. .

Calculating the Molar Mass of a Gas at STP Sample Problem 10.8 Calculating the Molar Mass of a Gas at STP A gaseous compound containing sulfur and oxygen has a density of 3.58 g/L at STP. What is the molar mass of the compound? 80.2 g/mol Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. .

END OF 10.2 Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. .