Chapter 8 Mole Conversions Part 2. 3.2: Molecular Mass/Weight Formula Mass/Weight The formula of an Acetylsalicylic Acid (Aspirin) molecule is C 9 H 8.

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Presentation transcript:

Chapter 8 Mole Conversions Part 2

3.2: Molecular Mass/Weight Formula Mass/Weight The formula of an Acetylsalicylic Acid (Aspirin) molecule is C 9 H 8 O 4 Acetylsalicylic Acid (Aspirin) has molar mass of g/mol How many hydrogen atoms are contained in a g tablet?

0.372g C 9 H 8 O 4

0.372g C 9 H 8 O 4 mol g

0.372g C 9 H 8 O 4 mol 6.02 x molecules g mol

0.372g C 9 H 8 O 4 mol 6.02 x molecules 8 H atoms g mol molecule

0.372g C 9 H 8 O 4 mol 6.02 x molecules 8 H atoms g mol molecule = 9.94 x H atoms

What is the mass in grams of one atom of carbon?

12.0 g/mol

What is the mass in grams of one atom of carbon? 12.0 g mol

What is the mass in grams of one atom of carbon? 12.0 gmol mol 6.02 x atoms = 1.99 x g/atom

What is the mass in grams of one molecule of water?

18.0 g mol

What is the mass in grams of one molecule of water? 18.0 gmol mol 6.02 x molecules = 2.99 x g/molecule

Information for Upcoming Mole Quiz How does a mole relate to particles and mass? (example: One mole of H 2 O is 6.02 x H 2 O molecules and has a mass of 18g). Be able to use this information in factor-label problems. Know how to determine the number of atoms in a molecule. Be able to use this information in factor- label problems. Be able to determine the number of grams/molecule. Identify the diatomic gases. Do metric conversions.

Homework Mole Worksheet (#1-20) Notice that answers are provided for this worksheet in your notebook.