Slide 1 of 43 Chemistry10.1

© Copyright Pearson Prentice Hall Slide 2 of 43 The Mole: A Measurement of Matter You could measure the amount of sand in a sand sculpture by counting each grain of sand, but it would be much easier to weigh the sand. You’ll discover how chemists measure the amount of a substance using a unit called a mole, which relates the number of particles to the mass. 10.1

© Copyright Pearson Prentice Hall The Mole: A Measurement of Matter > Slide 3 of 43 Measuring Matter What are three methods for measuring the amount of something? 10.1

Slide 4 of 43 © Copyright Pearson Prentice Hall The Mole: A Measurement of Matter > Measuring Matter You often measure the amount of something by one of three different methods—by count, by mass, and by volume. 10.1

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© Copyright Pearson Prentice Hall Slide 9 of 43 Practice Problems for Sample Problem 10.1 Problem Solving 10.1 Solve Problem 1 with the help of an interactive guided tutorial.

© Copyright Pearson Prentice Hall The Mole: A Measurement of Matter > Slide 10 of 43 What is a Mole? What Is a Mole? How is Avogadro’s number related to a mole of any substance? 10.1

Slide 11 of 43 © Copyright Pearson Prentice Hall The Mole: A Measurement of Matter > What is a Mole? A mole of any substance contains Avogadro’s number of representative particles, or 6.02  representative particles. The term representative particle refers to the species present in a substance: usually atoms, molecules, or formula units. 10.1

Slide 12 of 43 © Copyright Pearson Prentice Hall The Mole: A Measurement of Matter > What is a Mole? Converting Number of Particles to Moles One mole (mol) of a substance is 6.02  representative particles of that substance and is the SI unit for measuring the amount of a substance. The number of representative particles in a mole, 6.02  10 23, is called Avogadro’s number. 10.1

Slide 13 of 43 © Copyright Pearson Prentice Hall The Mole: A Measurement of Matter > What is a Mole? 10.1

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Slide 19 of 43 © Copyright Pearson Prentice Hall The Mole: A Measurement of Matter > What is a Mole? Converting Moles to Number of Particles 10.1

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© Copyright Pearson Prentice Hall The Mole: A Measurement of Matter > Slide 25 of 43 The Mass of a Mole of an Element How is the atomic mass of an element related to the molar mass of an element? 10.1

Slide 26 of 43 © Copyright Pearson Prentice Hall The Mole: A Measurement of Matter > The Mass of a Mole of an Element The atomic mass of an element expressed in grams is the mass of a mole of the element. The mass of a mole of an element is its molar mass. 10.1

Slide 27 of 43 © Copyright Pearson Prentice Hall The Mole: A Measurement of Matter > The Mass of a Mole of an Element One molar mass of carbon, sulfur, mercury, and iron are shown. 10.1

© Copyright Pearson Prentice Hall Slide 28 of 43 The Mole: A Measurement of Matter > Animation 11 Find out how Avogadro’s number is based on the relationship between the amu and the gram.

Slide 29 of 43 © Copyright Pearson Prentice Hall The Mole: A Measurement of Matter > The Mass of a Mole of an Element 10.1

© Copyright Pearson Prentice Hall The Mole: A Measurement of Matter > Slide 30 of 43 The Mass of a Mole of a Compound How is the mass of a mole of a compound calculated? 10.1

© Copyright Pearson Prentice Hall Slide 31 of 43 The Mole: A Measurement of Matter > The Mass of a Mole of a Compound To calculate the molar mass of a compound, find the number of grams of each element in one mole of the compound. Then add the masses of the elements in the compound. 10.1

Slide 32 of 43 © Copyright Pearson Prentice Hall The Mole: A Measurement of Matter > The Mass of a Mole of a Compound Substitute the unit grams for atomic mass units. Thus 1 mol of SO 3 has a mass of 80.1 g. 10.1

Slide 33 of 43 © Copyright Pearson Prentice Hall The Mole: A Measurement of Matter > The Mass of a Mole of a Compound Molar Masses of Glucose, Water, and Paradichlorobenzene 10.1

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© Copyright Pearson Prentice Hall Slide 38 of 43 Practice Problems for Sample Problem 10.4 Problem Solving 10.7 Solve Problem 7 with the help of an interactive guided tutorial.

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