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Chapter 8
The MolePart 2
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What is Avogadro’s Favorite Music
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What is Avogadro’s Favorite Music
a
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Converting Moles and GramsConverting Moles and Grams
Aluminum is often used for the structure of light-weight bicycle frames. How many grams of Al are in 3.62 moles of Al?
a
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•1 mole Al = ?
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•1 mole Al = ?•1 mole Al = 27.0 g Al
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•1 mole Al = 27.0 g Al
What are the conversion factors?
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•1 mole Al = 27.0 g Al
27.0g Al or 1 mol Al 1 mol Al 27.0 g Al
What are the conversion factors?
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•1 mole Al = 27.0 g Al
27.0g Al or 1 mol Al 1 mol Al 27.0 g Al
What are the conversion factors?
Aluminum is often used for the structure of light-weight bicycle frames. How many grams of Al are in 3.62 moles of Al?
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•1 mole Al = 27.0 g Al•Conversion factors for Al
27.0g Al or 1 mol Al 1 mol Al 27.0 g Al
3.62 moles Al
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•1 mole Al = 27.0 g Al•Conversion factors for Al
27.0g Al or 1 mol Al 1 mol Al 27.0 g Al
3.62 moles Al 27.0 g Al 1 mole Al
= 97.7g Al
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A can of diet cola contains about 200.0 mg of the
artificial sweetener aspartame (Nutra-Sweet)
formula C14H18N2O5 . It is used to sweeten diet
foods, coffee and soft drinks. How many moles of
aspartame are present in a can of diet cola?
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A can of diet cola contains about 200.0 mg of the
artificial sweetener aspartame (Nutra-Sweet)
formula C14H18N2O5 . It is used to sweeten diet
foods, coffee and soft drinks. How many moles of
aspartame are present in a can of diet cola?
200.0 mg
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A can of diet cola contains about 200.0 mg of the
artificial sweetener aspartame (Nutra-Sweet)
formula C14H18N2O5 . It is used to sweeten diet
foods, coffee and soft drinks. How many moles of
aspartame are present in a can of diet cola?
200.0 mg
mg
0.001g
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A can of diet cola contains about 200.0 mg of the
artificial sweetener aspartame (Nutra-Sweet)
formula C14H18N2O5 . It is used to sweeten diet
foods, coffee and soft drinks. How many moles of
aspartame are present in a can of diet cola?14(12.0) + 18(1.0) + 2(14.0) + 5(16.0) = 294.0 g/mol
200.0 mg
mg
0.001g
g
mol
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A can of diet cola contains about 200.0 mg of the
artificial sweetener aspartame (Nutra-Sweet)
formula C14H18N2O5 . It is used to sweeten diet
foods, coffee and soft drinks. How many moles of
aspartame are present in a can of diet cola?14(12.0) + 18(1.0) + 2(14.0) + 5(16.0) = 294.0 g/mol
200.0 mg
mg
0.001g
294.0 g
mol 6.803 x 10-4 mol C14H18N2O5
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How many aspartame molecules would you consume for each can of diet cola that you drank?
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How many aspartame molecules would you consume for each can of diet cola that you drank?
6.803 x 10-4 mol C14H18N2O5
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How many aspartame molecules would you consume for each can of diet cola that you drank?
6.803 x 10-4 mol C14H18N2O5 mol
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How many aspartame molecules would you consume for each can of diet cola that you drank?
6.803 x 10-4 mol C14H18N2O5 mol
molecules
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How many aspartame molecules would you consume for each can of diet cola that you drank?
6.803 x 10-4 mol C14H18N2O5 mol
6.02 x 1023 molecules
= 4.10 x 1020 C14H18N2O5 molecules
410,000,000,000,000,000,000
410 million trillion aspartame molecules
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1mol of C14H18N2O5
• What does it weigh?
– 294.0 g
• How many C14H18N2O5’s?
– 6.02 x 1023 C14H18N2O5 molecules
• How many carbon atoms?
– 14(6.02 x 1023) C atoms
• How many hydrogen atoms?
– 18(6.02 x 1023) H atoms
• How many nitrogen atoms?
– 2(6.02 x 1023) N atoms
• How many oxygen atoms?
– 5(6.02 x 1023) O atoms
• How many total atoms?
– 39(6.02 x 1023) atoms
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How many carbon atoms would be contained in 145g of aspartame?
• Remember that aspartame is C14H18N2O5 and it has a gram formula mass of 294.0 g/mol.
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How many carbon atoms would be contained in 145g of aspartame (C14H18N2O5)?
4.16 x 1024 C atoms
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How many grams of aspartame contain 8.74 x 1022 oxygen atoms?
• Aspartame is C14H18N2O5 and it has a molar mass of 294.0 g/mol.
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How many grams of aspartame (C14H18N2O5) contain 8.74 x 1022 oxygen atoms?
8.54 g of aspartame
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Lab Activity
• Mole Worksheet 2 – Mole Worksheet 2 is a lab exercise. – Notice that there is a front and a back to the
worksheet. – The answers on the back have been given
however you need to show your work as factor label problems to get credit.
– You and your lab partner need to turn in one copy of the worksheet by the end of the period.