Aim: What is the Mole? Do Now: Using conversion factors convert the following: 1.How many inches are...
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Transcript of Aim: What is the Mole? Do Now: Using conversion factors convert the following: 1.How many inches are...
![Page 1: Aim: What is the Mole? Do Now: Using conversion factors convert the following: 1.How many inches are there in 45.6 cm? (2.54 cm = 1 in.) 2.How many centimeters.](https://reader035.fdocuments.in/reader035/viewer/2022062905/5a4d1ad67f8b9ab05997339e/html5/thumbnails/1.jpg)
Aim: What is the Mole?
Do Now: Using conversion factors convert the following:1.How many inches are there in 45.6 cm? (2.54 cm = 1 in.)2.How many centimeters are there in 1.23 x 10-6km? (1km = 100000 cm)
![Page 2: Aim: What is the Mole? Do Now: Using conversion factors convert the following: 1.How many inches are there in 45.6 cm? (2.54 cm = 1 in.) 2.How many centimeters.](https://reader035.fdocuments.in/reader035/viewer/2022062905/5a4d1ad67f8b9ab05997339e/html5/thumbnails/2.jpg)
Counting large numbers…• Easier when you use counting units:
Dozen (12)Ream (500)
Pair (2)Gross (144)
•Regardless of the object, the number that the units represents is always the same
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•Atoms and molecules are extremely small, making it impossible actually count them (even in the smallest of samples)•Chemists need a unit for counting accurately the
# of atoms, molecules, or formula units; they use the mole•Mole (mol) = the SI base unit used to measure
the amount of a substance•1 mole of anything contains 6.02 x 1023
representative particles
![Page 4: Aim: What is the Mole? Do Now: Using conversion factors convert the following: 1.How many inches are there in 45.6 cm? (2.54 cm = 1 in.) 2.How many centimeters.](https://reader035.fdocuments.in/reader035/viewer/2022062905/5a4d1ad67f8b9ab05997339e/html5/thumbnails/4.jpg)
1 mole of apples = 6.02 x 1023 apples
1 mole of diamonds = 6.02 x 1023 diamonds
1 mole of baseballs = 6.02 x 1023 baseballs
1 mole of carbon atoms = 6.02 x 1023 carbon atoms
![Page 5: Aim: What is the Mole? Do Now: Using conversion factors convert the following: 1.How many inches are there in 45.6 cm? (2.54 cm = 1 in.) 2.How many centimeters.](https://reader035.fdocuments.in/reader035/viewer/2022062905/5a4d1ad67f8b9ab05997339e/html5/thumbnails/5.jpg)
The same applies to moles of compounds•How many molecules are in 1 mole of NH3?
6.02 x 1023 molecules of NH3
•How many molecules are in 1 mole of C9H8O4?6.02 x 1023
molecules of C9H8O4
![Page 6: Aim: What is the Mole? Do Now: Using conversion factors convert the following: 1.How many inches are there in 45.6 cm? (2.54 cm = 1 in.) 2.How many centimeters.](https://reader035.fdocuments.in/reader035/viewer/2022062905/5a4d1ad67f8b9ab05997339e/html5/thumbnails/6.jpg)
What is Avogadro’s Number•6.02 X 1023 representative particles/mol•1 mol of any substance has 6.02 X 1023 representative
particles
![Page 7: Aim: What is the Mole? Do Now: Using conversion factors convert the following: 1.How many inches are there in 45.6 cm? (2.54 cm = 1 in.) 2.How many centimeters.](https://reader035.fdocuments.in/reader035/viewer/2022062905/5a4d1ad67f8b9ab05997339e/html5/thumbnails/7.jpg)
What are representative particles?•Representative particles refers to the species present in a
substance: usually atoms, molecules, or formula units
![Page 8: Aim: What is the Mole? Do Now: Using conversion factors convert the following: 1.How many inches are there in 45.6 cm? (2.54 cm = 1 in.) 2.How many centimeters.](https://reader035.fdocuments.in/reader035/viewer/2022062905/5a4d1ad67f8b9ab05997339e/html5/thumbnails/8.jpg)
Converting Particles to Moles• How many roses are in 3 ½ dozen roses?
USE CONVERSION FACTORS!!!3.5 dozen x 12 roses =42 roses
1 dozen conversion factor• How many pencils are in 6 gross?
6 gross x 144 pencils =864 pencils 1 gross conversion factor
12 roses = 1 dozen roses or
144 pencils = 1 gross pencils or
![Page 9: Aim: What is the Mole? Do Now: Using conversion factors convert the following: 1.How many inches are there in 45.6 cm? (2.54 cm = 1 in.) 2.How many centimeters.](https://reader035.fdocuments.in/reader035/viewer/2022062905/5a4d1ad67f8b9ab05997339e/html5/thumbnails/9.jpg)
Conversion factor•A conversion factor is used to convert a measured quantity to a different unit of measure without changing the relative amount. To accomplish this, a ratio (fraction) is established that equals one (1)
![Page 10: Aim: What is the Mole? Do Now: Using conversion factors convert the following: 1.How many inches are there in 45.6 cm? (2.54 cm = 1 in.) 2.How many centimeters.](https://reader035.fdocuments.in/reader035/viewer/2022062905/5a4d1ad67f8b9ab05997339e/html5/thumbnails/10.jpg)
Conversion factors for mole representative particles
or
Particles Moles Moles Particles
![Page 11: Aim: What is the Mole? Do Now: Using conversion factors convert the following: 1.How many inches are there in 45.6 cm? (2.54 cm = 1 in.) 2.How many centimeters.](https://reader035.fdocuments.in/reader035/viewer/2022062905/5a4d1ad67f8b9ab05997339e/html5/thumbnails/11.jpg)
Converting Number of Particles to Mole
Conversion factor
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Converting number of atoms to moles
Units you want are on top
These units cancel out
0.465
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Converting Moles to Particles and Particles to Moles•How many moles contain 4.50 x 1024 atoms of zinc? 4.50 x 1024 atoms Zn x 1 mol zinc 6.02 x 1023 atoms Zn
7.48 mol Zn
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SolveHow many moles of magnesium is 1.25 X 1023 atoms of magnesium?
![Page 15: Aim: What is the Mole? Do Now: Using conversion factors convert the following: 1.How many inches are there in 45.6 cm? (2.54 cm = 1 in.) 2.How many centimeters.](https://reader035.fdocuments.in/reader035/viewer/2022062905/5a4d1ad67f8b9ab05997339e/html5/thumbnails/15.jpg)
Converting moles to number of particles
Conversion factor
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Converting Moles to ParticlesHow many atoms can be found in 3.91 moles of xenon?
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Converting Moles to Particles•How many particles of sucrose are in 3.50 moles of
sucrose?
3.50 mol sucrose x 6.02 x 1023 rep. part. 1mol
2.11 x 1024 particles of sucrose
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SolveHow many cadmium atoms are there in 6.57 × 103 moles?X atoms of Cd= 6.57 x 103 mol ()X atoms of Cd = 3.96 x 1027 atoms of Cd
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Solve• How many molecules are in 2.00 moles of H2O?Conv. Factor(s) Set-UpX molecules = 2.00 mol H2O ) X molecules = 1.20 x 1024 molecules H2O
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Solve• How many moles are in 6.02 x 1023 atoms of carbon?Conv. Factor(s) Set-Up
• If you have 0.00812 mole of H2CO3, how many molecules do you have?
Conv. Factor(s) Set-Up
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Challenge• How many atoms are in 2.00 moles of H2O? (Hint: H2O has 3 atoms)Conv. Factor(s) Set-Up