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. .

What ways can you quantify how much you have of something? What Is a Mole? What ways can you quantify how much you have of something? Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. .

This is similar to using What Is a Mole? The ‘mole’ is a unit of measurement used to count the number of particles found within a substance. This is similar to using Dozen (12) Pair (2) Ream (500) Gross (144) http://ed.ted.com/lessons/daniel-dulek-how-big-is-a-mole-not-the-animal-the-other-one Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. .

What Is a Mole? 1 mole = 6.02 × 1023 of ANYTHING 6.02 × 1023 is called Avogadro’s number in honor of the person who started working with it. http://ed.ted.com/lessons/daniel-dulek-how-big-is-a-mole-not-the-animal-the-other-one Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. .

Representative particle What Is a Mole? representative particle - species present in a substance, usually atoms, molecules, or formula units. Representative particle Example Element Atom Copper Molecular Compound Molecule H2O Ionic Compound Formula Unit NaCl Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. .

1 mole = 6.02 × 1023 representative particles What Is a Mole? The mole can be used as a conversion factor 1 mole = 6.02 × 1023 representative particles 1 mole 6.02 × 1023 of something 6.02 × 1023 of something 1 mole Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. .

How many molecules are in 6.3 moles of methane (CH4)? Sample Problem 10.3 Converting Moles to Number of Molecules How many molecules are in 6.3 moles of methane (CH4)? Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. .

How many molecules are in 6.3 moles of methane (CH4)? Sample Problem 10.3 Converting Moles to Number of Molecules How many molecules are in 6.3 moles of methane (CH4)? 3.79 x 1024 molecules of CH4 Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. .

How many atoms are in 6.3 moles of methane (CH4)? Sample Problem 10.3 Converting Moles to Atoms How many atoms are in 6.3 moles of methane (CH4)? Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. .

How many atoms are in 6.3 moles of methane (CH4)? Sample Problem 10.3 Converting Moles to Atoms How many atoms are in 6.3 moles of methane (CH4)? 1.89 x 1025 atoms Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. .

Molar Mass Mass of a mole of an element For elements, this is the atomic mass given in the periodic table, expressed in grams. Also called molecular weight or molecular mass(in case of molecules which is the sum of atomic masses of all the atoms they are composed of) Element Molar Mass Carbon 12.0 g Hydrogen 1.0 g Chlorine 35.5 g Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. .

The Mass of a Mole of an Element Molar Mass The Mass of a Mole of an Element 1 mol of sulfur atoms = 32.1 g 1 mol of carbon atoms = 12.0 g 1 mol of iron atoms = 56.0 g This figure shows one mole of carbon, sulfur, and iron. Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. .

Molar Mass The mass of a mole of a compound is the sum of the masses of all the atoms in the compound. Example Molar mass SO3 = molar mass S + molar mass O3 = 32.1g + 16.0g x 3 = 80.1 g Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. .

Finding the Molar Mass of a Compound Sample Problem 10.4 Finding the Molar Mass of a Compound Calculate the molar mass of the following compounds. NaCl N2O3 Fe(OH)2 Be3(PO4)2 Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. .

Finding the Molar Mass of a Compound Sample Problem 10.4 Finding the Molar Mass of a Compound Calculate the molar mass of the following compounds. NaCl – 58.5g N2O3 – 76.0 g Fe(OH)2 – 89.8 g Be3(PO4)2 – 217 g Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. .

END OF 10.1 Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. .