Molar (Formula) Mass Molar (Formula) Mass. Where do we find the atomic mass? For every 1 mol, there...
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Transcript of Molar (Formula) Mass Molar (Formula) Mass. Where do we find the atomic mass? For every 1 mol, there...
![Page 1: Molar (Formula) Mass Molar (Formula) Mass. Where do we find the atomic mass? For every 1 mol, there are 22.99g!](https://reader035.fdocuments.net/reader035/viewer/2022081501/5697bf781a28abf838c81eee/html5/thumbnails/1.jpg)
Molar (Formula) Mass
![Page 2: Molar (Formula) Mass Molar (Formula) Mass. Where do we find the atomic mass? For every 1 mol, there are 22.99g!](https://reader035.fdocuments.net/reader035/viewer/2022081501/5697bf781a28abf838c81eee/html5/thumbnails/2.jpg)
Where do we find the atomic mass?
For every 1 mol, there are 22.99g!
![Page 3: Molar (Formula) Mass Molar (Formula) Mass. Where do we find the atomic mass? For every 1 mol, there are 22.99g!](https://reader035.fdocuments.net/reader035/viewer/2022081501/5697bf781a28abf838c81eee/html5/thumbnails/3.jpg)
Molar Mass
Molar (Formula) Mass – mass of a molecule
Units: g/mol“grams per mol”
![Page 4: Molar (Formula) Mass Molar (Formula) Mass. Where do we find the atomic mass? For every 1 mol, there are 22.99g!](https://reader035.fdocuments.net/reader035/viewer/2022081501/5697bf781a28abf838c81eee/html5/thumbnails/4.jpg)
Example 1
Is the molecule ionic or covalent?
Name the molecule:
Molecule = NaCl
(metal and nonmetal)
No prefixes for ionic
Ionic
Sodium Chloride
![Page 5: Molar (Formula) Mass Molar (Formula) Mass. Where do we find the atomic mass? For every 1 mol, there are 22.99g!](https://reader035.fdocuments.net/reader035/viewer/2022081501/5697bf781a28abf838c81eee/html5/thumbnails/5.jpg)
Example 1
# A atoms in molecule x atomic mass of A
# B atoms in molecule x atomic mass of B
Add those numbers
Molecule = NaCl
Na
1
x
22.99 g/mol
1
58.4 g/mol
Cl
x 22.99 g/mol
+
=
35.45 g/mol35.45 g/mol
![Page 6: Molar (Formula) Mass Molar (Formula) Mass. Where do we find the atomic mass? For every 1 mol, there are 22.99g!](https://reader035.fdocuments.net/reader035/viewer/2022081501/5697bf781a28abf838c81eee/html5/thumbnails/6.jpg)
Example 2
Is the molecule ionic or covalent?
Write the formula:
Molecule = Dihydrogen Monoxide
(nonmetals)Covalent
H2O
![Page 7: Molar (Formula) Mass Molar (Formula) Mass. Where do we find the atomic mass? For every 1 mol, there are 22.99g!](https://reader035.fdocuments.net/reader035/viewer/2022081501/5697bf781a28abf838c81eee/html5/thumbnails/7.jpg)
Example 2
# A atoms in molecule x atomic mass of A
# B atoms in molecule x atomic mass of B
Add those numbers
Molecule = H2O
H 2
x
1.01 g/mol
1
18.o2 g/mol
O
x
2.02 g/mol +
=
16.00 g/mol16.00 g/mol
![Page 8: Molar (Formula) Mass Molar (Formula) Mass. Where do we find the atomic mass? For every 1 mol, there are 22.99g!](https://reader035.fdocuments.net/reader035/viewer/2022081501/5697bf781a28abf838c81eee/html5/thumbnails/8.jpg)
Example 3
Is the molecule ionic or covalent?
Name the molecule:
Molecule = (NH4)2O
(has a polyatomic ion)
Made up of ions: NH4+ and
O2-
Ionic
Ammonium Oxide
![Page 9: Molar (Formula) Mass Molar (Formula) Mass. Where do we find the atomic mass? For every 1 mol, there are 22.99g!](https://reader035.fdocuments.net/reader035/viewer/2022081501/5697bf781a28abf838c81eee/html5/thumbnails/9.jpg)
Example 3Molecule = (NH4)2O
N: 2 x 14 = 28H: 8 x 1 = 8O: 1 x 16 = 16(NH4)2O: 52 g/mol
![Page 10: Molar (Formula) Mass Molar (Formula) Mass. Where do we find the atomic mass? For every 1 mol, there are 22.99g!](https://reader035.fdocuments.net/reader035/viewer/2022081501/5697bf781a28abf838c81eee/html5/thumbnails/10.jpg)
Example 4
Is the molecule ionic or covalent?
Write the formula:
Molecule = Beryllium Hydroxide
(has a polyatomic ion)
Ionic
Be(OH)2
Made up of ions: Be2+ and OH-
![Page 11: Molar (Formula) Mass Molar (Formula) Mass. Where do we find the atomic mass? For every 1 mol, there are 22.99g!](https://reader035.fdocuments.net/reader035/viewer/2022081501/5697bf781a28abf838c81eee/html5/thumbnails/11.jpg)
Example 4Molecule: Be(OH)2
Be: 1 x 9.01 g/molO: 2 x 16 = 32 g/mol
Be(OH)2 = 43.03 g/mol
H: 2 x 1.01 = 2.02 g/mol
![Page 12: Molar (Formula) Mass Molar (Formula) Mass. Where do we find the atomic mass? For every 1 mol, there are 22.99g!](https://reader035.fdocuments.net/reader035/viewer/2022081501/5697bf781a28abf838c81eee/html5/thumbnails/12.jpg)
Group PracticeCheck your answers when done
Chemical Formula
Molar Mass
KF
Na3PO4
Al2(CO3)3
Ca(SCN)2
Iron (III) Oxide
Dicarbon Tetrafluroide
Lead (II) Chromate
Boron Sulfate
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Practice by Yourself
In your notes, find the molar mass of:1. H2O2
2. NaNO3
3. H2S4. (NH4)2S5. Ca3(PO4)2
6. Mg(NO3)2
7. Lithium Nitride8. Trinitrogen Pentabromide9. Iron (III) Nitrate10.Ammonium Carbonate