Name ____________________________________________________________ Date __________________
The Mole
Section 2 Mass and the Mole
Scan Section 2, using the checklist below as a guide.
 Read all section titles.
 Read all boldfaced words.
 Read all tables and graphs.
 Look at all pictures and read the captions.
 Think about what you already know about this subject.
List four things you expect to learn from this section.
Accept all reasonable responses. Possible answers:
to relate the mass of an atom to the mass of a mole in atoms
1. how
____________________________________________________________
to calculate the number of moles in a given mass of an
2. how
____________________________________________________________
element
and the mass of a given number of moles of an element
____________________________________________________________
to calculate the number of moles of an element when
3. how
____________________________________________________________
given
the number of atoms of the element
____________________________________________________________
to calculate the number of atoms of an element when
4. how
____________________________________________________________
given
the number of moles of the element
____________________________________________________________
Use your text to define this term.
molar mass
Chemistry: Matter and Change
the mass in grams of one mole of any pure substance
___________________________________________________________
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Science Notebook
Name ____________________________________________________________ Date __________________
Section 2 Mass and the Mole (continued)
The Mass of a
Mole
Use with pages 325–326.
Analyze molar mass by completing the following statements.
12 grams.
The mass of one mole of carbon-12 atoms is _____
1/12th the mass of
1 gram and is _______
The mass of one mole of hydrogen is _____
carbon
one mole of ________.
1/3rd the mass of one mole of
The mass of one mole of helium-4 is _______
carbon and is equal to _______
4
_______
grams.
6.02  1023 atoms of Mn.
One mole of manganese is equal to __________
Using Molar Mass
Use with pages 327–332.
Organize the following equations by drawing a line from type of
conversion to the correct equation.
mole to mass
mass 
1 mole
number of grams
mass to mole
mass 
1 mole
,
number of grams
moles 
Chemistry: Matter and Change
6.02 1023
1 mole
number of grams
1 mole
mass to atoms
number of moles 
atoms to mass
atoms 
1 mole
,
6.02 1023
moles 
number of grams
1 mole
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Science Notebook
Name ____________________________________________________________ Date __________________
Section 2 Mass and the Mole (continued)
Using Molar Mass
Mass-to-Atoms
Conversion
Use with Example
Problem 4, page 330.
Solve Read Example Problem 4.
You Try It
Problem
Determine how many atoms are in 10 g of pure copper (Cu).
1. Analyze the Problem
Known:
10.0 g Cu
mass  ___________
Unknown:
molar mass
number of atoms
2. Solve for the Unknown
Use the periodic table to find the atomic mass of copper and convert it
to g/mol.
63.54 g/mol
_________________________________________________________
Complete the conversion equations.
mass Cu  conversion factor  moles Cu
10.0g / Cu  _______________
1 mol Cu / 63.54 g Cu  _______
0.157 moles Cu
___________
moles Cu  conversion factor  atoms Cu
0.157 mol Cu  _____________________________________
6.02  1023 atoms Cu/1 mol Cu  9.45  1022
______
atoms Cu
3. Evaluate the Answer
Restate the answer with correct significant digits.
There are 9.45  1022 atoms of copper in 10.0 g of copper.
_________________________________________________________
Chemistry: Matter and Change
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Science Notebook