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**1. Determine the number of atoms in 2.50 mol Zn.**

Page 311 1. Determine the number of atoms in 2.50 mol Zn.

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**Page 311 6.02x1023atoms 2.50mol x ----------- = 1mol**

1. Determine the number of atoms in 2.50 mol Zn. 6.02x1023atoms 2.50mol x = 1mol

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**1. Determine the number of atoms in 2.50 mol Zn. 15.05 x 1023atoms**

Page 311 1. Determine the number of atoms in 2.50 mol Zn. 15.05 x 1023atoms

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**1. Determine the number of atoms in 2.50 mol Zn. 15.1 x 1023atoms**

Page 311 1. Determine the number of atoms in 2.50 mol Zn. 15.1 x 1023atoms

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**1. Determine the number of atoms in 2.50 mol Zn. 1.51 x 1024atoms**

Page 311 1. Determine the number of atoms in 2.50 mol Zn. 1.51 x 1024atoms

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**2. Given 3.25 mol AgNO3, determine the number of formula units.**

Page 311 2. Given 3.25 mol AgNO3, determine the number of formula units.

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**Page 311 6.02x1023units 3.25mol x ----------- = 1mol**

2. Given 3.25 mol AgNO3, determine the number of formula units. 6.02x1023units 3.25mol x = 1mol

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Page 311 2. Given 3.25 mol AgNO3, determine the number of formula units. 19.6 x 1023formula units

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Page 311 2. Given 3.25 mol AgNO3, determine the number of formula units. 1.96 x 1024formula units

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**3. Calculate the number of molecules in 11.5 mol H2O.**

Page 311 3. Calculate the number of molecules in 11.5 mol H2O.

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**Page 311 6.02x1023molecules 11.5mol x ----------- = 1mol**

3. Calculate the number of molecules in 11.5 mol H2O. 6.02x1023molecules 11.5mol x = 1mol

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Page 311 3. Calculate the number of molecules in 11.5 mol H2O. 69.2 x 1023formula units

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Page 311 3. Calculate the number of molecules in 11.5 mol H2O. 6.92 x 1024formula units

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**How many moles contain each of the following?**

Page 312 How many moles contain each of the following?

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**How many moles contain each of the following? a. 5.75 x 1024 atoms Al**

Page 312 How many moles contain each of the following? a x 1024 atoms Al

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Page 312 How many moles contain each of the following? a x 1024 atoms Al 1 mole 5.75x1024 x 6.02x1023

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Page 312 How many moles contain each of the following? a x 1024 atoms Al 5.75 x 1024 6.02 x 1023

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Page 312 How many moles contain each of the following? a x 1024 atoms Al 57.5 x 1023 6.02 x 1023

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Page 312 How many moles contain each of the following? a x 1024 atoms Al 57.5 x 1023 6.02 x 1023

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**Page 312 9.55 moles How many moles contain each of the following?**

a x 1024 atoms Al 9.55 moles

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**Page 312 How many moles contain each of the following?**

b x 1024 molecules CO2

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Page 312 How many moles contain each of the following? b x 1024 molecules CO2 1 mole 3.75x1024 x 6.02x1023

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Page 312 How many moles contain each of the following? b x 1024 molecules CO2 3.75x1024 6.02x1023

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Page 312 How many moles contain each of the following? b x 1024 molecules CO2 37.5x1023 6.02x1023

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Page 312 How many moles contain each of the following? b x 1024 molecules CO2 37.5x1023 6.23 moles 6.02x1023

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**Page 312 How many moles contain each of the following?**

c x 1023 units ZnCl2

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Page 312 How many moles contain each of the following? c x 1023 units ZnCl2 1 mole 3.58x1023 x 6.02x1023

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Page 312 How many moles contain each of the following? c x 1023 units ZnCl2 3.58x1023 6.02x1023

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Page 312 How many moles contain each of the following? c x 1023 units ZnCl2 3.58x1023 6.02x1023

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Page 312 How many moles contain each of the following? c x 1023 units ZnCl2 37.5x1023 0.595 moles 6.02x1023

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**How many moles contain each of the following? d. 2.50 x 1020 atoms Fe**

Page 312 How many moles contain each of the following? d x 1020 atoms Fe

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Page 312 How many moles contain each of the following? d x 1020 atoms Fe 1 mole 2.50x1020 x 6.02x1023

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Page 312 How many moles contain each of the following? d x 1020 atoms Fe 2.50 x 1020 6020 x 1020

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Page 312 How many moles contain each of the following? d x 1020 atoms Fe 2.50 x 1020 moles

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Page 312 How many moles contain each of the following? d x 1020 atoms Fe 2.50 x 1020 4.15 x 10-4 moles

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7.3. Formula Mass – for any molecule, formula unit, or ion, it is the ____ of the ________ masses of all atoms represented in its formula. H 2 O for example.

7.3. Formula Mass – for any molecule, formula unit, or ion, it is the ____ of the ________ masses of all atoms represented in its formula. H 2 O for example.

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