CHEMISTRY

Exercise 3.28: Problems by Topic – Chemical Formulas and Molecular View of Elements and Compounds
Part A
Which of the following elements have molecules as their basic units?
Check all that apply.
ANSWER:
fluorine

lead

nitrogen

bromine

Correct
Exercise 3.30: Problems by Topic – Chemical Formulas and Molecular View of Elements and Compounds
Classify each of the following compounds as ionic or molecular.
Part A
CF2Cl2
ANSWER:
molecular

ionic

Correct
Part B
CO
ANSWER:
ionic

molecular

Correct
Part C
ClO2
ANSWER:
ionic

molecular

Correct
Part D
NI3
ANSWER:
molecular

ionic

Correct
Exercise 3.34: Problems by Topic – Formulas and Names for Ionic Compounds
Write a formula for the ionic compound that forms between each of the following pairs of elements.
Part A
caesium and chlorine
Express your answer as a chemical formula.
ANSWER:
Correct
Part B
aluminum and nitrogen
Express your answer as a chemical formula.
ANSWER:
Correct
Part C
sodium and oxygen
Express your answer as a chemical formula.
ANSWER:
Correct
Part D
barium and bromine
Express your answer as a chemical formula.
ANSWER:
Correct
Exercise 3.46: Problems by Topic – Formulas and Names for Ionic Compounds
Write a formula for each of the following ionic compounds.
Part A
lead(II) chloride
Express your answer as a chemical formula.
ANSWER:
Correct
Part B
iron(II) iodate
Express your answer as a chemical formula.
ANSWER:
Correct
Part C
potassium chromate
Express your answer as a chemical formula.
ANSWER:

Correct
Part D
potassium fluoride
Express your answer as a chemical formula.
ANSWER:
Correct
Part E
iron(III) hydroxide
Express your answer as a chemical formula.
ANSWER:
Correct
Part F
calcium phosphate
Express your answer as a chemical formula.
ANSWER:
Correct
Exercise 3.52: Problems by Topic – Formulas and Names for Molecular Compounds and Acids
Write a formula for each of the following molecular compounds.
Part A
dichlorine hexoxide
Express your answer as a chemical formula.
ANSWER:
Correct
Part B
dichlorine monoxide
Express your answer as a chemical formula.
ANSWER:

Correct
Part C
dinitrogen trioxide
Express your answer as a chemical formula.
ANSWER:
Correct
Part D
diboron hexahydride
Express your answer as a chemical formula.
ANSWER:
Correct
Part E
diboron tetrachloride
Express your answer as a chemical formula.
ANSWER:
Correct
Exercise 3.58: Problems by Topic – Formula Mass and the Mole Concept for Compounds
Calculate the formula mass for each of the following compounds.
Part A
MgBr2
Express your answer using two decimal places.
ANSWER:
Correct
Part B
H3PO4
Express your answer using two decimal places.
ANSWER:
All attempts used; correct answer displayed

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