How many eggs are there in 5 dozen? How many moles are in 2.25 grams of the element iron, Fe?
How do you measure how much?
What’s up with the Mole?. How do we measure matter? By weight: We buy bananas by the _______________. By volume: Milk is sold by the ____________________.
1 Chapter 5 Chemical Quantities and Reactions 5.1 The Mole Copyright © 2009 by Pearson Education, Inc.
1 Chapter 6 Chemical Quantities 6.5 Percent Composition and Empirical Formulas Copyright © 2008 by Pearson Education, Inc. Publishing as Benjamin Cummings.
coefficients give ratios
