Chapter 8

The MolePart 2

What is Avogadro’s Favorite Music

What is Avogadro’s Favorite Music

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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

•1 mole Al = ?

•1 mole Al = ?•1 mole Al = 27.0 g Al

•1 mole Al = 27.0 g Al

What are the conversion factors?

•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?

•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?

•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

•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

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?

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

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

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

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

How many aspartame molecules would you consume for each can of diet cola that you drank?

How many aspartame molecules would you consume for each can of diet cola that you drank?

6.803 x 10-4 mol C14H18N2O5

How many aspartame molecules would you consume for each can of diet cola that you drank?

6.803 x 10-4 mol C14H18N2O5 mol

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

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

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

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.

How many carbon atoms would be contained in 145g of aspartame (C14H18N2O5)?

4.16 x 1024 C atoms

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.

How many grams of aspartame (C14H18N2O5) contain 8.74 x 1022 oxygen atoms?

8.54 g of aspartame

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.