Feb 26th, 2013
AGENDA: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 26
Objective: 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?
Tuesday, February 26
Objective: 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?
Tuesday, February 26
Objective: 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?
Tuesday, February 26
Objective: 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?
Feb 26th, 2013
AGENDA: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 26
Objective: 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