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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)
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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)
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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)
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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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NaOH, Br
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Write a balanced chemical equation based on the following description:
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4+
1
3
4
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7
8
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When the following molecular equation is balanced using the smallest possible integer coefficients, the values of these coefficients are:
hydrobromic acid (aq)
hydrogen (g)+
bromine (1)
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b For the following reaction, give the balanced equation for the reaction.
PC13 (1) + 3H₂O(1)→ H3PO3(aq) + 3HCl(g)
mol PC13
mol H₂O
mol H3PO3
mol HCI
3
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Instructions: Answer each of the problems below by showing your solutions neatly and logically. You may use periodic table for atomic masses of elements. Copy and answer each problem and please box your final answers.
7. Orthophosphate (PO43-) is determined by weighing as ammonium phosphomolybdate, (NH4)PO4 • 12Mo03. Calculate the percent P in the sample and the percent P205 if 1.1762 g precipitate (ppt) were obtained from a 0.3711-g sample.
NOTE: KINDLY WRITE THE SOLUTIONS ON A SEPARATE SHEET OF PAPER
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Balancing Equations
47. Balance the following equations:
(a) CaC2(s) + H,O(l) Ca(OH)2(s) + C,H2(g)
(b) (NH4)2Cr2O-(s) Cr2O3(s) + N2(g) + H2O(g)
(c) CH;NH2(g) + O2(g) CO2(g) + N2(g) + H2O(g)
48. Balance the following equations:
(a) CH12O6 (s) + O2(g)→ CO, (g) + H2O (1)
(b) XeF4(g) + H2O (1) Xe (g) + O2(g) + HF (g)
(c) NaCl (s) + H;O(g) + SO2(g) + O2 (g)-
NazSO4 (s) + HCI (g)
15
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b Calculate the number df moles in x
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Exercise 3.62 - Enhanced - with Feedback
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Review | Constants
Periodic Table
You may want to reference (Pages 107 - 110) Section 3.8 while completing this problem.
Calculate the mass of each sample.
Part A
19.6 mol ΗΝΟ
3
Express your answer with the appropriate units.
?
HA
η (HNO. ) - 1431
g
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How many moles of H,SO, are required to completely react with 7.20 | mol of Al
4
according to the balanced chemical reaction:
2 Al(s) + 3 H,SO,(aq) → Al,(SO,),(aq) + 3 H,(g)
STARTING AMOUNT
98.08
342.14
2.02
7.20
26.98
10.8
3
21.6
3.60
1
2.40
6.022 х 1023
2
g Al,(SO,),
g Al
mol H2
g H,SO,
g H2
mol H,SO,
mol Al
mol Al,(SO,),
+
90
OCT
14
étv
w
280
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Balance the equation by typing the coefficients into the boxes provided. Include 1 in your answer if necessary.
Word equation: Solid nickel is combined with hydrochloric acid to produce nickel(II) chloride and hydrogen gas.
Nis)
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Given the equation
H2SO4 + NAOH → Na2SO4 + H2O
(a) How many moles of NaOH will react with 24 moles of H,SO4? 1
7.
(b) How many moles of Na,SO4 will be produced when 14 moles of NaOH react?
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When N2(g) react with O2(g) to form N,0(g) according to the following equation, energy is absorbed
from the surroundings.
2N2(g) + O2(g)–→2N½O(g)
Is this reaction endothermic or exothermic? endothermic v
What is the sign of AH for the reaction? positive
Would the energy of the surroundings increase or decrease as a result of this process? increase
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Ammonia (NH,) chemically reacts with oxygen gas (0,) to produce nitric oxide (NO) and water (H,0).
What mass of nitric oxide is produced by the reaction of 2.65 g of oxygen gas?
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Rank the basic properties of the following compounds by explaining the factors that
influence them:Me3N, Me2NH, MENH2, NH3
a. NH2OH, NH2NH2
b. MesN, Me2NH, MeNH2, NH3
c. MENH2, ETNH2, i-PRMH2, i-BUNH2
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According to the following reaction, how many grams of potassium phosphate will be formed upon the complete reaction of 23.3 grams of
phosphoric acid with excess potassium hydroxide ?
potassium hydroxide(aq) + phosphoric acid(aq) →→→ potassium phosphate(aq) + water(1)
grams potassium phosphate
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Unit 10
Stoichiometry
Introduction to Stoichiometry Mole-Mole Conversions
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10.1
Use balanced chemical equations to relate amounts of reactants and products with mole ratios
1. Use the following equation to solve the problem below:
I.
3 SiO, + 4 Al →3 Si + 2 Al,O,
a. If 6.0 moles of SiO, react, how many moles of
1.
Al react?
iI.
Si are produced?
Il.
Al,0, are produced?
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Question 10 of 22
Balance the following chemical equation (if necessary):
CH(g) + O,(g) → H,O(g) + CO,(g)
04-
03.
02.
O+
O2+ D3+ 04+
1
4
7
8
9.
O3
04
Os
+
(s)
(1)
(g)
(aq)
CO
CH.0
H,O
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Transition
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Balancing Chemical Equations
STEP 4: Add in
_Al, +_C_N,→ _Al+ _(CN),
the coefficients
STEP 1: Identify
THE TYPES of
atoms you have on
each side.
STEP 2: List HOW
MANY of each atom
you have on cach
side.
STEP 3: List HOW
MANY of each atom
you have on cach side
AFTER balancing the
equation.
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[References]
Use the References to access important values if needed for this question.
When the following molecular equation is balanced using the smallest possible integer coefficients, the values of these coefficients are:
hydrogen peroxide (H2O2) (aq)
water (1) +
oxygen (g
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Balance the chemical equation below using the smallest possible whole number stoichiometric coefficients.
esc
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CH,(g) +O,(g) → CO,(g) +H,O(g)
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Drag and drop the appropriate
choices to fill in the following chemical reaction:
where you start the reaction with 2 moles of
C2H60 and 3 moles of 02.
The Limiting Reactant is O2
Reaction Table
C2H60
3
2
H20
CO2 (g) +
(g)
(g)
+ 02 (g)
Initial
Change
Final
0123 || 4
+1
-1 +2 -2 | +3 -3 |+4-4 +5 -5
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HSC 258
Major Projec X
Mind Tap - Cengage Lea X
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The illustration to the left represents a mixture of
iodine ( purple ) and fluorine ( green )
molecules.
If the molecules in the above illustration react to form IF3 according to the equation
I +3 F2 2 IF3 ,
the limiting reagent is
the number of IF, molecules formed is
and
the number of
atoms/molecules in excess is
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11 a) Molecular Equation:
Fe(OH)3 +
H2SO4
b) lonic Equation:
c) Net lonic Equation:
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Given the following reaction, identify only those chemical species that are undergoing a chemical
change:
Pb(CIO4)2 + 2 NaBr → PbBr2 + 2 NaCIO4
O Pb and CIO,-
O Pb2* and Br1-
O Not enough information
Na* and CIO,-
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7-1
/ Fall 2021 / SHS Chemistry (CHEM)
Due date 3/2/22 2:00 PM This module is past due, and su
3. kac stoich 1 10 pts possible
The elements lithium and oxygen react ex-
plosively to from lithium oxide (Li2O) accord-
ing to the unbalanced equation below.
Li + O2 →, Li2O.
How much lithium oxide will form if
2.13 mol of lithium react?
Answer in units of mol.
Answer in units of mol
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9.
Homework • Unanswered
HCl(ag) +_N22CO3(aq) →
Identify the spectator ions.
NaCl(ag) + _CO2(8) + _H2O(1)
Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer.
Nat andH+
a
b
Nat and CO
Natand Cl-
d co?-and Cl-
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NTS
GAMES VIDEOS
VA SOL PROG
Balancing Act!
Balance this equation!
(Equation number 1 of 10)
C6H6OS +
02 →
12CO2 +
H2O + 2SO3
Check my answer!
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After balancing the following chemical equation, what is the balancing coefficients of KClO3 and O2 respectivey ?
KClO3 KCl + O2
The balancing coefficient of KClO3 is ……………..
The balancing coefficients of O2 is ………………..
16
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