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Naming Compounds, Molar Mass, The Mole, Empirical Formula Activity - Sept 18th/19th (Workshop 3)
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Naming Compounds, Molar Mass, The Mole, Empirical Formula Activity - Sept 18th/19th (Workshop 3)
Due: 11:59pm on Tuesday, September 19, 2023
To understand how points are awarded, read the Grading Policy for this assignment.
Exercise 3.24 - Enhanced - with Feedback
MISSED THIS?
Read Section 3.3 (Page) .
Determine the number of each type of atom in each formula:
Part A
Ca(NO
3
)
2
ANSWER:
Correct
The subscript of 2 applies to both nitrogen and oxygen because they are enclosed within parentheses. Parentheses are used to group atoms, such
as polyatomic ions. The name of the polyatomic ion, NO
−
3
, in this chemical formula in nitrate.
Part B
NH
4
Cl
ANSWER:
Correct
Part C
NaNO
3
ANSWER:
Correct
2 calcium atoms, 6 nitrogen atoms and 6 oxygen atoms.
1 calcium atom, 1 nitrogen atom and 6 oxygen atoms.
2 calcium atoms, 2 nitrogen atoms and 6 oxygen atoms.
1 calcium atom, 2 nitrogen atoms and 6 oxygen atoms.
1 nitrogen atom, 1 hydrogen atom and 1 chlorine atom.
1 nitrogen atom, 4 hydrogen atoms and 1 chlorine atom.
4 nitrogen atoms, 4 hydrogen atoms and 1 chlorine atom.
1 nitrogen atom, 1 hydrogen atom and 4 chlorine atoms.
1 sodium atom, 1 nitrogen atom and 3 oxygen atoms.
1 sodium atom, 3 nitrogen atoms and 3 oxygen atoms.
3 sodium atoms, 3 nitrogen atoms and 3 oxygen atoms.
1 sodium atom, 2 nitrogen atoms and 3 oxygen atoms.
9/20/23, 12:55 AM
Naming Compounds, Molar Mass, The Mole, Empirical Formula Activity - Sept 18th/19th (Workshop 3)
https://session.masteringchemistry.com/myct/assignmentPrintView?assignmentID=11849091
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Part D
KHSO
4
ANSWER:
Correct
Exercise 3.29 - Enhanced - with Feedback and Hints
MISSED THIS?
Read Section 3.2 (Page) .
Part A
Classify each of the following compounds as ionic or molecular.
Drag the appropriate items to their respective bins.
Hint 1. Classify the bonds in the compounds as ionic or covalent
The sharing of electrons by two nonmetals is known as a covalent bond. Conversely, the bonding of a metal and a nonmetal via the loss and gain of
electrons is known as an ionic bond.
Classify each bond as covalent or ionic.
Drag the appropriate items to their respective bins.
ANSWER:
ANSWER:
1 potassium atom, 4 hydrogen atoms, 4 sulfur atoms, and 4 oxygen atoms.
4 potassium atoms, 4 hydrogen atoms, 4 sulfur atoms, and 4 oxygen atoms.
1 potassium atom, 1 hydrogen atom, 4 sulfur atoms, and 4 oxygen atoms.
1 potassium atom, 1 hydrogen atom, 1 sulfur atom, and 4 oxygen atoms.
Reset
Help
S
and O
N
and H
Sr
and F
Fe
and O
Covalent bond
Ionic bond
9/20/23, 12:55 AM
Naming Compounds, Molar Mass, The Mole, Empirical Formula Activity - Sept 18th/19th (Workshop 3)
https://session.masteringchemistry.com/myct/assignmentPrintView?assignmentID=11849091
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Correct
Molecular compounds are held together by covalent bonds between nonmetal atoms. Coversely, ionic compounds are held together by ionic bonds
between a metal and a nonmetal.
SO
3
and NH
3
have only nonmetals in their composition, and, therefore, the bonds in these compounds are covalent and the compounds are
molecular.
Fe
2
O
3
and SrF
2
each have a metal in their composition (
Fe
and Sr
, respectively), and, therefore, the bonds in these compounds are ionic and the
compounds are subsequently ionic.
Exercise 3.32 - Enhanced - with Feedback
MISSED THIS?
Read Section 3.4 (Page) .
Part A
Based on the molecular views, classify each substance as an atomic element, a molecular element, an ionic compound, or a molecular compound.
Drag the appropriate items to their respective bins.
ANSWER:
Reset
Help
Fe
2
O
3
NH
3
SO
3
SrF
2
Molecular
Ionic
9/20/23, 12:55 AM
Naming Compounds, Molar Mass, The Mole, Empirical Formula Activity - Sept 18th/19th (Workshop 3)
https://session.masteringchemistry.com/myct/assignmentPrintView?assignmentID=11849091
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Correct
Elements can occur in atomic form (e.g., He
atoms) or in diatomic form (e.g., N
2
and O
2
), and the latter type is referred to as a molecular element
.
Compounds are formed between different elements, and the type of compound depends on the bond. Covalent bonds result in the formation of
individual molecules or molecular compounds. Ionic bonds form between ions, and the electrostatic forces are strong, so ionic compounds tend to
form lattice networks of alternating charges.
Exercise 3.36 - Enhanced - with Feedback
MISSED THIS?
Read Section (Page) ; Watch KCV 3.5
, IWE 3.3 .
Type a formula for the compound that forms between
lithium and each polyatomic ion.
Part A
Enter the compound that forms between lithium and carbonate.
Express your answer as a chemical formula.
ANSWER:
Correct
The cation has a charge of 1 +
, and the anion has a charge of 2 −
. Two cations are needed to balance the charge on the anion: Li
2
CO
3
.
Part B
Enter the compound that forms between lithium and phosphate.
Express your answer as a chemical formula.
ANSWER:
Reset
Help
Li
2
CO
3
Li
3
PO
4
Atomic element
Molecular element
Ionic compound
Molecular compound
9/20/23, 12:55 AM
Naming Compounds, Molar Mass, The Mole, Empirical Formula Activity - Sept 18th/19th (Workshop 3)
https://session.masteringchemistry.com/myct/assignmentPrintView?assignmentID=11849091
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Correct
The cation has a charge of 1 +
, and the anion has a charge of 3 −
. Three cations are needed to balance the charge on the anion: Li
3
PO
4
.
Part C
Enter the compound that forms between lithium and hydrogen phosphate.
Express your answer as a chemical formula.
ANSWER:
Correct
The cation has a charge of 1 +
, and the anion has a charge of 2 −
. Two cations are needed to balance the charge on the anion: Li
2
HPO
4
.
Part D
Enter the compound that forms between lithium and acetate.
Express your answer as a chemical formula.
ANSWER:
Correct
The cation has a charge of 1 +
, and the anion has a charge of 1 −
. One cation is needed to balance the charge on the anion: LiC
2
H
3
O
2
.
Exercise 3.39 - Enhanced - with Feedback and Hints
MISSED THIS?
Read Section 3.5 (Page) ; Watch KCV 3.5
, IWE 3.11
.
Give each ionic compound an appropriate name.
Part A
SnI
2
Spell out the full name of the compound.
Hint 1. Classify metals based on the need to specify charge in their name
The full name of an ionic compound can be constructed in the following way:
name of
cation
(metal)
charge of cation (metal)
in Roman numerals
in parentheses
base name of
anion (nonmetal)
+
ide
However, specifying the charge of the cation is not necessary for all metals, because some of them can form ions of only one charge and therefore
would be the same in all compounds. The charge only has to be specified for metals that can form ions of more than one charge.
Classify the elements below based on their need to specifiy the charge in their name.
Drag the appropriate elements to their respective bins.
ANSWER:
Li
2
HPO
4
LiC
2
H
3
O
2
(
)
9/20/23, 12:55 AM
Naming Compounds, Molar Mass, The Mole, Empirical Formula Activity - Sept 18th/19th (Workshop 3)
https://session.masteringchemistry.com/myct/assignmentPrintView?assignmentID=11849091
6/46
ANSWER:
Correct
The charge on Sn
must be 2+ for the compound to be charge-neutral with two I
−
anions. The name of SnI
2
is the name of the cation, tin
, followed by
the charge of the cation in parentheses and the base name of the anion, iod with the ending ide
. The full name is tin(II) iodide.
Part B
CrS
Spell out the full name of the compound.
Hint 1. Classify metals based on the need to specify charge in their name
The full name of an ionic compound can be constructed in the following way:
name of
cation
(metal)
charge of cation (metal)
in Roman numerals
in parentheses
base name of
anion (nonmetal)
+
ide
However, specifying the charge of the cation is not necessary for all metals, because some of them can form ions of only one charge and therefore
would be the same in all compounds. The charge only has to be specified for metals that can form ions of more than one charge.
Classify the elements below based on their need to specifiy the charge in their name.
Drag the appropriate elements to their respective bins.
ANSWER:
Reset
Help
Sn
Cr
Rb
Ba
tin(II) iodide
(
)
Require specification of charge
Do not require specification of charge
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