CHAPTER 10 THE MOLE. Time for the math part of chemistry!

CHAPTER 10

THEMOLE

Time for the math part of chemistry!

To use chemistry in real-life…you need numbers!

What is a “dozen?”

602,000,000,000,000,000,000,000

Which weighs more a kilogram of feathers, or a kilogram of bowling balls?

Which weighs more a mole of feathers, or a mole of bowling balls?

How big is a MOLE OF MARBLES?

North Building Lobby

Baltimore City

The tallest mountain in the Rockies

What is the purpose of having this huge number?

and why this particular number?

You want to buy oranges….

You can buy them individually, e.g., by the dozen…

Lab Procedure:1. Weigh out a molecule of water

REVIEW: What is an atomic mass unit?(an AMU)

How much does a molecule of water weigh?

1.00 atomic mass unit = 1.6605 x 10-24 grams

Our best balance at Bryn Mawr weighs to 0.001 grams

Time for Dimensional Analysis!

You can buy them by the pound…