CHEMISTRY Feb 24, 2011.

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Presentation transcript:

CHEMISTRY Feb 24, 2011

Warm Up Place your homework on the table How many moles are there in 67 L of H2 gas? How many moles are there in 78 g of Mg(OH)2?

Agenda Warm Up Grade Unit 8 Worksheet 1 Unit 8: Intro to Mole Part II Quiz Homework Unit 8 Worksheet 2 Test Make Up Friday (Last Day)

Grade Homework Unit 8 Worksheet 1

Mole Conversions 3 Step Process (Refer to chart) How many atoms are in 2L of Oxygen gas? Where do you begin? (the given: Volume) What do you need in the end? (atoms) How many conversion factors do we need? Volume to moles Moles to atoms 2 L x 1 mole x 6.02x1023 atoms of O2 = 5.38 x 102 22.4 L 1 mole atoms

Practice How many molecules are there in 98 g of Potassium hydroxide?

How many grams are there in 4 x 1024 molecules of Iron (II) chloride?

How many molecules are there in 15 L of Cl2 gas?

What is the volume of gas (in L) in 5 x 1025 molecules of O2?

Unit 8 Quiz #1 How many grams are there in 4.5 moles of sodium chloride? How many moles are there in 3.25 x 1025 atoms of silver? How many molecules are there in 96 g of carbon dioxide? How many grams are there in 4 x 1024 molecules of Iron (II) chloride?

Closure Reflect learning on Mole Calculations