3.E: Molecules, Compounds and Chemical Equations (Exercises)

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These are homework exercises to accompany the Textmap created for Chemistry: A Molecular Approach by Nivaldo Tro. Complementary General Chemistry question banks can be found for other Textmaps and can be accessed here. In addition to these publicly available questions, access to private problems bank for use in exams and homework is available to faculty only on an individual basis; please contact Delmar Larsen for an account with access permission.

Additional Questions

1. For the following molecules; write the chemical formula, determine how many atoms are present in one molecule, determine the molecular weight, determine the number of moles in exactly 1 gram, and the number of moles in exactly 10-6 gram.

a. carbon dioxide
b. iron (II) chloride
c. dinitrogen pentoxide
d. iron (III) sulfate

2. Name the following compounds, determine the molecular weight, determine the percent composition, and determine how many moles in 8.35 grams of the compound.

a. KI
b. CaF2
c. Cu2SO4
d. N2O
e. LiOH

3. Give the chemical formula (or atomic symbol), molecular (or atomic) weight, and charge for the following ions:

a. sulfate
b. sulfite
c. nitrate
d. chloride
e. nitride
f. acetate
g. carbonate

4. Calculate the number of moles in:

a. 20.1797 g of Ne
b. 45.3594 g of Ne
c. 0.198669 g of Ne

5. Calculate the mass of:

a. 2.00 mole of Fe
b. 4.362 x 10-5 mol of Fe
c. 4.362 x 10-5 mol of Li