DATE _______________
NOTES-53A-MOLAR MASS (STUDENT)
CHEM 110 (BEAMER)
NOTES 53A: The Mole-02
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Molar Mass
General Information

You will need your periodic table for these notes

You will need your calculators for these notes

Relevant Chapter Reading: Chapter 8.3
I.
Molar Mass
Molar Mass
Definition of Molar Mass:
Calculating Molar Mass

You must show your work, including units, through every step for Exam 4. After that, you will only have to
show your work once or twice.

You will need your periodic tables.
Beamer’s Special SigFig Rule: (Other professors will have their own rules, as well).
Calculating Molar Mass and Writing Conversion Factors
1a)
Write the molar mass of calcium. (No calculations necessary).
1b) Write the molar mass of calcium in conversion factor form.
Page 1 of 5
DATE _______________
2a)
NOTES-53A-MOLAR MASS (STUDENT)
CHEM 110 (BEAMER)
Write the molar mass of sulfur. (No calculations necessary).
2b) Write the molar mass of sulfur in conversion factor form.
3a)
Write the molar mass of atomic hydrogen.
3b) Write the molar mass of atomic hydrogen in conversion factor form.
4a)
Write the molar mass of hydrogen.
4b) Write the molar mass of hydrogen in conversion factor form.
Page 2 of 5
DATE _______________
5a)
NOTES-53A-MOLAR MASS (STUDENT)
CHEM 110 (BEAMER)
Calculate the molar mass of sodium chloride. Units through every step!
5b) Write the molar mass of sodium chloride in conversion factor form.
5c)
Convert 0.64 moles of sodium chloride formula units to grams of sodium chloride.
5d) Convert 15.00 grams of sodium chloride formula units to moles of sodium chloride.
5e)
Use your answer to Question 5d to determine the number of sodium chloride formula units in the
sample.
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DATE _______________
6a)
NOTES-53A-MOLAR MASS (STUDENT)
CHEM 110 (BEAMER)
Calculate the molar mass of aluminum hydrogen carbonate. Units through every step!
6b) Write the molar mass of aluminum hydrogen carbonate in conversion factor form.
6c)
A sample of aluminum hydrogen carbonate contains 0.003572 moles of aluminum hydrogen
carbonate. How many moles of carbon atoms are in the sample?
6d) Use your answer to Question 6c to determine the number of carbon atoms in the sample.
Page 4 of 5
DATE _______________
NOTES-53A-MOLAR MASS (STUDENT)
CHEM 110 (BEAMER)
7a)
A sample of tetraiodine nonxide contains 4.50 × 1019 atoms of iodine tetroxide. Calculate the
number of molecules of tetraiodine nonoxide.
7b)
Use your answer to Question 7a to calculate the number of moles of tetraiodine nonoxide.
7c)
Determine the molar mass of tetraiodine nonoxide. Units through every step!
7d)
Determine the mass (in milligrams) of tetraiodine nonoxide of the sample in Question 7b.
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