Chapter 7 Notes, Part I - schools.misd.orgschools.misd.org/upload/template/6094/Chemistry Notes One...
Transcript of Chapter 7 Notes, Part I - schools.misd.orgschools.misd.org/upload/template/6094/Chemistry Notes One...
![Page 1: Chapter 7 Notes, Part I - schools.misd.orgschools.misd.org/upload/template/6094/Chemistry Notes One Step M… · Practice Problem #1 How many moles are in 2.57 x 1025 atoms He? 2.57](https://reader030.fdocuments.in/reader030/viewer/2022013021/5f085cb07e708231d421a241/html5/thumbnails/1.jpg)
Chemistry Notes
What is a mole?
One Step Problems
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A Mole...
A mole is a unit of
measurement that tells how
many particles of something
you have!
1 mole = 6.02 x 1023 particles
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What are particles?
Particles could be anything,
but because of the size of the
number, we usually mean
atoms, molecules or formula
units.
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Avogadro’s Number
The number 6.02 x 1023 is
called Avogadro’s number.
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Practice Problem #1
How many moles are in
2.57 x 1025 atoms He?
![Page 6: Chapter 7 Notes, Part I - schools.misd.orgschools.misd.org/upload/template/6094/Chemistry Notes One Step M… · Practice Problem #1 How many moles are in 2.57 x 1025 atoms He? 2.57](https://reader030.fdocuments.in/reader030/viewer/2022013021/5f085cb07e708231d421a241/html5/thumbnails/6.jpg)
Practice Problem #1
How many moles are in
2.57 x 1025 atoms He?
2.57 x 1025 atoms He x 1 mole He = 42.7 moles He
6.02 x 1023 atoms He
![Page 7: Chapter 7 Notes, Part I - schools.misd.orgschools.misd.org/upload/template/6094/Chemistry Notes One Step M… · Practice Problem #1 How many moles are in 2.57 x 1025 atoms He? 2.57](https://reader030.fdocuments.in/reader030/viewer/2022013021/5f085cb07e708231d421a241/html5/thumbnails/7.jpg)
Practice Problem #2
How many molecules of CO2
are in 25.3 moles?
![Page 8: Chapter 7 Notes, Part I - schools.misd.orgschools.misd.org/upload/template/6094/Chemistry Notes One Step M… · Practice Problem #1 How many moles are in 2.57 x 1025 atoms He? 2.57](https://reader030.fdocuments.in/reader030/viewer/2022013021/5f085cb07e708231d421a241/html5/thumbnails/8.jpg)
Practice Problem #2
How many molecules of CO2 are
in 25.3 moles?
25.3 moles CO2 x 6.02 x 1023 molecules CO2 = 1.52 x 1025 molecules
1 mole CO2
![Page 9: Chapter 7 Notes, Part I - schools.misd.orgschools.misd.org/upload/template/6094/Chemistry Notes One Step M… · Practice Problem #1 How many moles are in 2.57 x 1025 atoms He? 2.57](https://reader030.fdocuments.in/reader030/viewer/2022013021/5f085cb07e708231d421a241/html5/thumbnails/9.jpg)
Moles and Volume
1 mole of all gases at a certain set
of conditions called STP
(standard temperature and
pressure) have the same
volume: 22.4L
So, 1 mole = 22.4L (gas @ STP)
![Page 10: Chapter 7 Notes, Part I - schools.misd.orgschools.misd.org/upload/template/6094/Chemistry Notes One Step M… · Practice Problem #1 How many moles are in 2.57 x 1025 atoms He? 2.57](https://reader030.fdocuments.in/reader030/viewer/2022013021/5f085cb07e708231d421a241/html5/thumbnails/10.jpg)
Practice Problem #3
How many moles of O2 are in
29.3L of O2 gas?
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Practice Problem #3
How many moles of O2 are in
29.3L of O2 gas?
29.3 L O2 x 1 mole O2 = 1.31 moles O2
22.4 L O2
![Page 12: Chapter 7 Notes, Part I - schools.misd.orgschools.misd.org/upload/template/6094/Chemistry Notes One Step M… · Practice Problem #1 How many moles are in 2.57 x 1025 atoms He? 2.57](https://reader030.fdocuments.in/reader030/viewer/2022013021/5f085cb07e708231d421a241/html5/thumbnails/12.jpg)
Practice Problem #4
If you have 3.6 moles of N2O
(Nitrous oxide) how many liters
would you have?
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Practice Problem #4
If you have 3.6 moles of N2O
(Nitrous oxide) how many
liters would you have?
3.6 moles N2O x 22.4 L N2O = 81 L N2O
1 mole N2O
![Page 14: Chapter 7 Notes, Part I - schools.misd.orgschools.misd.org/upload/template/6094/Chemistry Notes One Step M… · Practice Problem #1 How many moles are in 2.57 x 1025 atoms He? 2.57](https://reader030.fdocuments.in/reader030/viewer/2022013021/5f085cb07e708231d421a241/html5/thumbnails/14.jpg)
Mass and Moles
How do we usually measure
out chemicals in a lab?
We usually use mass to
measure out chemicals.
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Mass and Moles
The problem with mass is that
not all atoms or compounds
have the same mass.
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Mass and Moles
Avogadro’s number was
established by using Carbon-
12 as a standard. The
number of particles in 12
grams of carbon 12 was set as
1 mole.
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Mass and Moles
The atomic mass on the
periodic table is also an
element’s molar mass (the
mass of one mole of an
element, measured in
g/mol).
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What is the molar mass of...
![Page 19: Chapter 7 Notes, Part I - schools.misd.orgschools.misd.org/upload/template/6094/Chemistry Notes One Step M… · Practice Problem #1 How many moles are in 2.57 x 1025 atoms He? 2.57](https://reader030.fdocuments.in/reader030/viewer/2022013021/5f085cb07e708231d421a241/html5/thumbnails/19.jpg)
What is the molar mass of...
He
![Page 20: Chapter 7 Notes, Part I - schools.misd.orgschools.misd.org/upload/template/6094/Chemistry Notes One Step M… · Practice Problem #1 How many moles are in 2.57 x 1025 atoms He? 2.57](https://reader030.fdocuments.in/reader030/viewer/2022013021/5f085cb07e708231d421a241/html5/thumbnails/20.jpg)
What is the molar mass of...
He 4.0026 g/mol
![Page 21: Chapter 7 Notes, Part I - schools.misd.orgschools.misd.org/upload/template/6094/Chemistry Notes One Step M… · Practice Problem #1 How many moles are in 2.57 x 1025 atoms He? 2.57](https://reader030.fdocuments.in/reader030/viewer/2022013021/5f085cb07e708231d421a241/html5/thumbnails/21.jpg)
What is the molar mass of...
He 4.0026 g/mol
Al
![Page 22: Chapter 7 Notes, Part I - schools.misd.orgschools.misd.org/upload/template/6094/Chemistry Notes One Step M… · Practice Problem #1 How many moles are in 2.57 x 1025 atoms He? 2.57](https://reader030.fdocuments.in/reader030/viewer/2022013021/5f085cb07e708231d421a241/html5/thumbnails/22.jpg)
What is the molar mass of...
He 4.0026 g/mol
Al 26.982 g/mol
![Page 23: Chapter 7 Notes, Part I - schools.misd.orgschools.misd.org/upload/template/6094/Chemistry Notes One Step M… · Practice Problem #1 How many moles are in 2.57 x 1025 atoms He? 2.57](https://reader030.fdocuments.in/reader030/viewer/2022013021/5f085cb07e708231d421a241/html5/thumbnails/23.jpg)
What is the molar mass of...
He 4.0026 g/mol
Al 26.982 g/mol
Ba
![Page 24: Chapter 7 Notes, Part I - schools.misd.orgschools.misd.org/upload/template/6094/Chemistry Notes One Step M… · Practice Problem #1 How many moles are in 2.57 x 1025 atoms He? 2.57](https://reader030.fdocuments.in/reader030/viewer/2022013021/5f085cb07e708231d421a241/html5/thumbnails/24.jpg)
What is the molar mass of...
He 4.0026 g/mol
Al 26.982 g/mol
Ba 137.327 g/mol
![Page 25: Chapter 7 Notes, Part I - schools.misd.orgschools.misd.org/upload/template/6094/Chemistry Notes One Step M… · Practice Problem #1 How many moles are in 2.57 x 1025 atoms He? 2.57](https://reader030.fdocuments.in/reader030/viewer/2022013021/5f085cb07e708231d421a241/html5/thumbnails/25.jpg)
What is the molar mass of...
He 4.0026 g/mol
Al 26.982 g/mol
Ba 137.327 g/mol
Rn
![Page 26: Chapter 7 Notes, Part I - schools.misd.orgschools.misd.org/upload/template/6094/Chemistry Notes One Step M… · Practice Problem #1 How many moles are in 2.57 x 1025 atoms He? 2.57](https://reader030.fdocuments.in/reader030/viewer/2022013021/5f085cb07e708231d421a241/html5/thumbnails/26.jpg)
What is the molar mass of...
He 4.0026 g/mol
Al 26.982 g/mol
Ba 137.327 g/mol
Rn 222 g/mol
![Page 27: Chapter 7 Notes, Part I - schools.misd.orgschools.misd.org/upload/template/6094/Chemistry Notes One Step M… · Practice Problem #1 How many moles are in 2.57 x 1025 atoms He? 2.57](https://reader030.fdocuments.in/reader030/viewer/2022013021/5f085cb07e708231d421a241/html5/thumbnails/27.jpg)
Furthermore...
Since compounds are just atoms bonded together, you can find the molar mass of a compound by adding together the molar mass of all the elements in the compound.
![Page 28: Chapter 7 Notes, Part I - schools.misd.orgschools.misd.org/upload/template/6094/Chemistry Notes One Step M… · Practice Problem #1 How many moles are in 2.57 x 1025 atoms He? 2.57](https://reader030.fdocuments.in/reader030/viewer/2022013021/5f085cb07e708231d421a241/html5/thumbnails/28.jpg)
What is the molar mass of...
![Page 29: Chapter 7 Notes, Part I - schools.misd.orgschools.misd.org/upload/template/6094/Chemistry Notes One Step M… · Practice Problem #1 How many moles are in 2.57 x 1025 atoms He? 2.57](https://reader030.fdocuments.in/reader030/viewer/2022013021/5f085cb07e708231d421a241/html5/thumbnails/29.jpg)
What is the molar mass of...
NaCl
![Page 30: Chapter 7 Notes, Part I - schools.misd.orgschools.misd.org/upload/template/6094/Chemistry Notes One Step M… · Practice Problem #1 How many moles are in 2.57 x 1025 atoms He? 2.57](https://reader030.fdocuments.in/reader030/viewer/2022013021/5f085cb07e708231d421a241/html5/thumbnails/30.jpg)
What is the molar mass of...
NaCl 58.443 g/mol
![Page 31: Chapter 7 Notes, Part I - schools.misd.orgschools.misd.org/upload/template/6094/Chemistry Notes One Step M… · Practice Problem #1 How many moles are in 2.57 x 1025 atoms He? 2.57](https://reader030.fdocuments.in/reader030/viewer/2022013021/5f085cb07e708231d421a241/html5/thumbnails/31.jpg)
What is the molar mass of...
NaCl 58.443 g/mol
CO2
![Page 32: Chapter 7 Notes, Part I - schools.misd.orgschools.misd.org/upload/template/6094/Chemistry Notes One Step M… · Practice Problem #1 How many moles are in 2.57 x 1025 atoms He? 2.57](https://reader030.fdocuments.in/reader030/viewer/2022013021/5f085cb07e708231d421a241/html5/thumbnails/32.jpg)
What is the molar mass of...
NaCl 58.443 g/mol
CO2 44.009 g/mol
![Page 33: Chapter 7 Notes, Part I - schools.misd.orgschools.misd.org/upload/template/6094/Chemistry Notes One Step M… · Practice Problem #1 How many moles are in 2.57 x 1025 atoms He? 2.57](https://reader030.fdocuments.in/reader030/viewer/2022013021/5f085cb07e708231d421a241/html5/thumbnails/33.jpg)
What is the molar mass of...
NaCl 58.443 g/mol
CO2 44.009 g/mol
Be3N2
![Page 34: Chapter 7 Notes, Part I - schools.misd.orgschools.misd.org/upload/template/6094/Chemistry Notes One Step M… · Practice Problem #1 How many moles are in 2.57 x 1025 atoms He? 2.57](https://reader030.fdocuments.in/reader030/viewer/2022013021/5f085cb07e708231d421a241/html5/thumbnails/34.jpg)
What is the molar mass of...
NaCl 58.443 g/mol
CO2 44.009 g/mol
Be3N2 55.0506 g/mol
![Page 35: Chapter 7 Notes, Part I - schools.misd.orgschools.misd.org/upload/template/6094/Chemistry Notes One Step M… · Practice Problem #1 How many moles are in 2.57 x 1025 atoms He? 2.57](https://reader030.fdocuments.in/reader030/viewer/2022013021/5f085cb07e708231d421a241/html5/thumbnails/35.jpg)
What is the molar mass of...
NaCl 58.443 g/mol
CO2 44.009 g/mol
Be3N2 55.0506 g/mol
Ca(NO3)2
![Page 36: Chapter 7 Notes, Part I - schools.misd.orgschools.misd.org/upload/template/6094/Chemistry Notes One Step M… · Practice Problem #1 How many moles are in 2.57 x 1025 atoms He? 2.57](https://reader030.fdocuments.in/reader030/viewer/2022013021/5f085cb07e708231d421a241/html5/thumbnails/36.jpg)
What is the molar mass of...
NaCl 58.443 g/mol
CO2 44.009 g/mol
Be3N2 55.0506 g/mol
Ca(NO3)2 164.088 g/mol
![Page 37: Chapter 7 Notes, Part I - schools.misd.orgschools.misd.org/upload/template/6094/Chemistry Notes One Step M… · Practice Problem #1 How many moles are in 2.57 x 1025 atoms He? 2.57](https://reader030.fdocuments.in/reader030/viewer/2022013021/5f085cb07e708231d421a241/html5/thumbnails/37.jpg)
Practice Problem #5
How many grams of iron are
in 3.5 moles?
![Page 38: Chapter 7 Notes, Part I - schools.misd.orgschools.misd.org/upload/template/6094/Chemistry Notes One Step M… · Practice Problem #1 How many moles are in 2.57 x 1025 atoms He? 2.57](https://reader030.fdocuments.in/reader030/viewer/2022013021/5f085cb07e708231d421a241/html5/thumbnails/38.jpg)
Practice Problem #5
How many grams of iron are
in 3.5 moles?
3.5 moles Fe x 55.847 g Fe = 195.5 g Fe
1 mole Fe
![Page 39: Chapter 7 Notes, Part I - schools.misd.orgschools.misd.org/upload/template/6094/Chemistry Notes One Step M… · Practice Problem #1 How many moles are in 2.57 x 1025 atoms He? 2.57](https://reader030.fdocuments.in/reader030/viewer/2022013021/5f085cb07e708231d421a241/html5/thumbnails/39.jpg)
Practice Problem #6
How many moles of Na2O are
in 355.1g?
![Page 40: Chapter 7 Notes, Part I - schools.misd.orgschools.misd.org/upload/template/6094/Chemistry Notes One Step M… · Practice Problem #1 How many moles are in 2.57 x 1025 atoms He? 2.57](https://reader030.fdocuments.in/reader030/viewer/2022013021/5f085cb07e708231d421a241/html5/thumbnails/40.jpg)
Practice Problem #6
How many moles of Na2O are
in 355.1g?
355.1 g Na2O x 1 mole Na2O = 5.73 mol Na2O
61.979 g Na2O