Moles and Stoichiometry

1
Moles and Stoichiometry

• By Avery Carrico and Nick Ponturo

2
Moles

• Mole- used to convert from atomic mass units to
  grams
• Scientists use the mole as a unit of measurement
• Abbreviation mol
• Amedeo Avogadro discovered the mole
• Avogadros number 6.02 x 1023

3
Stoichiometry

• Stoichiometry- The use of the amount of
  particles, the mass or the volume of a reactant
  or product to calculate the amount of particles,
  the mass or the volume of another reactant or
  product.

4
Steps to Stoiciometry

• Write balanced chemical equation
• Convert quantities of known substances into moles
• Use coefficients in balanced equation to
  calculate the number of moles of the sought
  quantity
• Convert moles of sought quantity into desired
  units

5
Conversion Factors
Mole Trivia
Stoichiometry
10
10
10
20
20
20
30
30
30
6
Mole Trivia 10 Points

• QUESTION
• What is the abbreviation for Mole?
• ANSWER
• Mol

7
Mole Trivia 20 Points

• QUESTION
• What do scientists use the mole for?
• ANSWER
• As a unit of measurement

8
Mole Trivia 30 Points

• QUESTION
• Who discovered the mole?
• ANSWER
• Amedeo Avogadro

9
Conversion Factors 10 Points

• QUESTION
• How do you convert grams to moles?
• ANSWER
• Divide by the molar mass

10
Conversion Factors 20 Points

• QUESTION
• How do you convert liters to moles?
• ANSWER
• Divide by 22.4

11
Conversion Factors 30 Points

• QUESTION
• How do you convert atoms to moles.
• ANSWER
• Divide by Avogadros number

12
Stoichiometry 10 Points

• QUESTION
• 2H2O2 ?2H20
• If you have 2.0 grams of O2, assuming excess H2,
  how many moles of H2O are created?
• ANSWER
• 0.25 moles of H2O are created

13
Stoichiometry 20 Points

• QUESTION
• 2Na Cl2 ? 2NaCl
• If you have 3.00 moles of Na, assuming excess Cl,
  how many atoms of NaCl are created?
• ANSWER
• 1.81 x 1024 atoms of NaCl

14
Stoichiometry 30 Points

• QUESTION
• H2 Cl2? 2HCl
• How many liters of HCl are created from 3.4g of
  H2, assuming excess Cl2?
• ANSWER
• 75L of HCl are produced