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Chemistry Week 24. Please get out your Notebook and calculator!. Feb 26th, 2013. AGENDA: 1 – Bell Ringer 3 – Notes: Mole Conversion: Mole to Gram and Mole to Particle 5 – Work Time. Today’s Goal: Students will be able to convert from moles to grams and moles to particles. Homework - PowerPoint PPT Presentation
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Chemistry Week
24
Please get out your Notebook and
calculator!
Feb 26th, 2013AGENDA:1 – Bell Ringer3 – Notes: Mole
Conversion: Mole to Gram and Mole to Particle
5 – Work Time
Today’s Goal:Students will be able to
convert from moles to grams and moles to particles.
Homework1. Mole Conversions
Wkst 1 – due tomorrow! (change to classwork assignment)
2. Work from Week 23 due by Friday
Tuesday, February 26Objective: Students will be able to convert from
moles to grams and moles to particles.Bell Ringer: One dozen cupcakes have a mass of
13.5 grams. What is the mass of 2.5 dozen cupcakes?
2 MINUTES REMAINING…
Tuesday, February 26Objective: Students will be able to convert from
moles to grams and moles to particles.Bell Ringer: One dozen cupcakes have a mass of
13.5 grams. What is the mass of 2.5 dozen cupcakes?
1 MINUTES REMAINING…
Tuesday, February 26Objective: Students will be able to convert from
moles to grams and moles to particles.Bell Ringer: One dozen cupcakes have a mass of
13.5 grams. What is the mass of 2.5 dozen cupcakes?
30 seconds Remaining…
Tuesday, February 26Objective: Students will be able to convert from
moles to grams and moles to particles.Bell Ringer: One dozen cupcakes have a mass of
13.5 grams. What is the mass of 2.5 dozen cupcakes?
10 seconds Remaining…
BELL-RINGER TIME IS
UP!
Feb 26th, 2013AGENDA:1 – Bell Ringer3 – Notes: Mole
Conversion: Mole to Gram and Mole to Particle
5 – Work Time
Today’s Goal:Students will be able to
convert from moles to grams and moles to particles.
Homework1. Mole Conversions
Wkst 1 – due tomorrow! (change to classwork assignment)
2. Work from Week 23 due by Friday
Tuesday, February 26Objective: Students will be able to convert from
moles to grams and moles to particles.Bell Ringer: One dozen cupcakes have a mass of
13.5 grams. What is the mass of 2.5 dozen cupcakes?
2.5 dozen x 13.5 grams =
1 dozen
2.5 x 13.5 g
= 33.75 g
Mole Conversion Obj: SWBAT convert between moles,
grams and particles – Part 1 Date: 2/26/2013 Remember:
1 mole (mol) always = 6.02 x 1023 particles
1 mole = molar mass of ANY substance SO…. 6.02 x 1023 particles = molar mass
of ANY substance
Mole Conversion Ratios The information for 1 mole can be used
to create MOLAR RATIOS 1mole or molar mass of
substanceMolar mass 1 mole 1 mole or 6.02 x 1023
particles/atoms/molecules6.02 x 1023 1 mole
Mole to Gram Conversion Imagine if you want to measure out a
1.5 mole sample of silver metal…? Could you count out 1.5 moles? But you can use molar mass to convert
moles to grams, and you can measure grams.
Molar Mass of Silver =
1.5 mole
107.9 g Ag
1 mole Ag
... NO!
x 107.9 g = 1 mole
1.5 x 107.9 g =
161.8 g Ag
Practice Problems If you had a 7.5 mole sample of H2O,
how many grams would you have?1. Determine the molar mass.2. Convert! (Watch units!)
1. H2O =2xH =O =
18.0 g 1 mol
(2 x 1.0)+ 16.0
2. 7.5 mole H2O x 18.0 g
1 mol= 7.5 x 18.0 g H2O
= 135.0 g H2O
Mole to Particle Conversion Imagine if you want to know HOW
MANY atoms are in 1.5 moles of silver metal…? Could you count out those particles? But you can use 6.02 x 1023 to convert
moles to atoms. NOTE: you DO NOT need molar mass when
converting to particles/atoms/molecules
1.5 mole
... NO!
X 6.02 x 1023 1 mole
= 9.03 x 1023 atoms
Practice Problems If you had a 7.5 mole sample of H2O,
how many particles would you have?
7.5 mole H2O x 6.02 x 1023 particles 1 mol
= 7.5 x 6.02 x 1023 particles of H2O
= 4.52 x 1024 particles of H2O
Problem Solving Decision Tree
Read the problem
If moles and grams
Calculate Molar Mass
If moles grams
Multiply by molar mass
Multiply by 6.02 x 1023
If moles and particles
If moles particles