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End of term Quiz
End of term Quiz
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1
Names this covalent bond S
2
disulfide
desulfide
disulfur
sulfide
2
Which of these Lewis structures is BEST for N
2
O?
A
C
B
3
Double covalent bonds result in how many shared electrons?
eight
four
six
two
4
Solve the problem using Boyle's law:
62.0L
47L
94.8L
12L
5
In naming covalent bonds we use prefixes
False
True
6
What is the molar ratio of aluminum consumed to aluminum oxide produced?
4:2
4:3
2:3
2:4
7
On this phase change diagram, a phase change is occurring alone lines ___ & ___
B & D
B & C
A & C
A & B
8
What is the mole conversion for any gas in L?
Mass in grams from periodic table
Erik Blaschko
22.4
6.022x1023
9
Ca +2LiOH→Ca(OH)
2
+ 2Li Write the
mole
conversion factor for Ca to Ca(OH)
2
:
2moles Ca = 1 mole Ca(OH)2
1 mole Ca = 2 mole Ca(OH)2
1mole Ca= 1mole Ca(OH)2
2mole Ca = 2moles Ca(OH)2
10
Balancing Equations
4, 4, 3
1, 2, 4
2, 3, 3
2, 2, 3
11
What products will be formed in the following DECOMPOSITION reaction?
Cr and Br2
Cr and Br3
Cr2 and Br2
Cr and Br
12
What is molar ratio of P to O
2
?
1:5
4:2
4:5
5:4
13
Always add the word ______ when naming acids
icky
hydro
acid at the end
John
14
Double replacement reaction?
Ca + Cl2 -> CaCl2
Zn + CuCl2 --> ZnCl2 + Cu
2KClO3 --> 2KCl + 3O2
BaCl2 + MgSO4 --> BaSO4 + MgCl2
15
What is the molar ratio (proportion) of the balanced: O
2
to CO
2
?C
3
H
8(g)
+ 5O
2(g)
→ 3CO
2(g)
+ 4H
2
O
(g)
2 to 5
5 to 3
3 to 5
5 to 2
16
Neutralization reactions occur between:
acids and oxygen
acids and bases
metals and bases
non-metals and metals
17
What is empirical formula?
Lowest ratio of atoms in relation to each other
An estimate of the number of atoms in a compound
Total number of atoms in a compound
Highest ration of atoms in relation to each other
18
When naming acids, if the polyatomic ending is "ate" or "ite"
change the ending to ous
change the ending to hydro
change the ending to ic
19
What product will be formed in the following SYNTHESIS reaction?
Ca5N2
Ca2N3
CaN
Ca3N2
20
Where do the numbers come from for the mole to mole conversion?
Coefficients
Periodic Table
The law of matter
21
Molar ratio is
difference between actua product and calculated product
how many moles you have in your yard
what you get when you change from mass (grams) to moles
based on the coefficients in a balanced chemical equation
22
What is the law of conservation of mass?
Mass is conserved in chemical reactions
Mass is created and destroyed
Mass is converted into energy
Mass is neither created nor destroyed
23
What is the equation that combines Boyle's, Charles' and Gay-Lussac's gas laws?
P1V1/T1 = P2V2/T2
P1/T1 = P2/T2
V1/T1 = V2/T2
P1V1 = P2V2
24
Double replacement reactions
2 reactant compounds exchange ions forming 2 new compounds
One reactant breaks down into two or more products
One element replaces another in a single compound
Produce a single substance from multiple reactants
25
Stoichiometry Problem
A
C
B
D
26
Stoichiometry Problem
0.229g
0.23 g
1.83g
0.00012g
27
Naming Acids: HBrO
3
bromous acid
bromic acid
hydrobromic acid
hydrobromous acid
28
In a neutralization reaction
acid and bases disappear
water and salt are made
water and pop are made
29
double replacement reaction
AB --> A + B
AC + BD --> AD + BC
A + B --> AB
A + BC --> AC + B
30
Polar vs. Non-Polar
both share equally
both share unequally
polar share electrons unequally and non-polar share equally
polar share electrons equally and non-polar share unequally
31
Which of the examples is a covalent bond?
N2S3
ZnS
Rb2Se
SrS
32
These are the molecules in a __________________.
Liquid
Solid
Gas
33
Single Replacement Reaction
AB ➡️ A + B
AB + C ➡️ A + BC
A + B ➡️ AB
AB + CD ➡️ AD + CB
34
A phase
change
diagram shows...
reaction time
relationships between heat and temperature
reaction rates
3 stages of a substance
35
TYPES OF CHEMICAL REACTIONS
ALL ARE TYPES OF CHEMICAL REACTIONS
DECOMPOSITION
SYNTHESIS
SINGLE DECOMPOSITION
36
Calculate the molarity of a solution containing 0.007 moles of KOH in 2.5 mL of solution.
0.0028 M KOH
2.8 M KOH
357 M KOH
0.0175 M KOH
37
The law of conservation of mass means that
mass is always conserved
mass is massive
mass can be destroyed
mass can be created
38
The letter B on this graph represents which phase change?
melting/vaporizing
vaporizing/condensing
sublimating/depositing
melting/freezing
39
An Arrhenious base
accepts a proton
donates a proton
produces OH- in solution
Poduces H+ in solution
40
What is the order for stoichiometric conversions?
given→mole ratio→moles→desired unit
#g Given→moles→mole ratio→moles of Unknown
mole ratio→desired unit→given→moles of wanted→moles
41
What is the mole conversion factor to convert moles of Fe to moles of Al?
2 mol Al / 3 mol Fe
1 mol Al2O3 / 3 mol Fe
3 mol Fe / 2 mol Al
1 mol Al / 2 mol Fe
42
Naming covalent bonds include:
using the ending -ide for the second nonmetal
using prefixes for the subscripts of all subscripts
changing the first non-metals name
naming the elements as is
43
Lewis Structures
A
D
B
C
44
Kinetic Molecular Theory postulates? (Multiple answers)
the average kinetic energy is proportional to to the temperature
average kinetic energy is less than the temperature of gas
Gas is densly packed
pressure increases as particles hit each other (Collision transfers theory)
45
Which number is missing in the mole conversion setup below?
6.02 x 10^23
1000
40.08
12.01
46
An Arrhenious acid
donates a proton
accepts a proton
Poduces H+ in solution
produces OH- in solution
47
What is the melting point of the substance represented by the heating/cooling curve?
100°K
216.6°K
197.5°K
0°
48
Lewis structures show
valence protons
all protons
valence electrons
all electrons
49
Polar VS Non Polar
: CH
2
Br
2
Nonpolar Covalent Bond
Polar Covalent Bond
All covalent bonds.
Ionic Bonds
50
gay lussac law
volume of gas increases as the temperature increases
idk
pressure is directly proportional to temp
gas increases as the pressure decreases
51
Which of the following represents a synthesis reaction?
A + B ---> AB
Alcohol + organic acid---> ester
AB---> A + B
C + AB---> A+ CB
52
What is the molar mass of calcium?
40.08 g/mol
6.022 x10^23 atoms
grams to moles
All true
53
Covalent bonds form between...
Potatoes
Non-metals
Metals
Metals and non-metals
54
Charles' Law
Volume and Pressure are inversely Proportional
The total pressure = the sum of the partial pressures of each gas
Volume and Temperature are directly proportional
Volume and Moles are directly proportional
55
Solve the following Charles's Law problem
279.8oC
279.8oK
300oC
300oK
56
Which segment represents the state of matter with the highest average kinetic energy?
Gas
Solid
Liquid
57
Polar VS Non Polar
: CO
2
Ionic Bonds
Nonpolar Covalent Bond
All covalent bonds.
Polar Covalent Bond
58
These are the molecules in a _________________.
Liquid
Solid
Gas
59
Are molecular compounds composed of positive and negative ions?
False
True
60
Covalent Bonds:
Share Electrons
Split Electrons
Give/Take Electrons
61
What is molarity?
Molarity = liters per # moles
A way to describe the concentration of solution
Molarity = # moles per liter
Molarity = grams per # moles
62
When drawing Lewis structures, a line represents:
2 protons
1 proton
1 electron
2 electrons
63
Single Replacement Reactions
Two things replace each other
One element replaces another
Combustion mean "add oxygen"
2 substance combine to make one compound
64
In all gas laws,
the temp must be in Kelvins.
the temp must be in Celsius.
the pressure must be in mm Hg (millimeters of mercury).
the pressure must be in Atmospheres.
65
These are the molecules in a ___________________.
Solid
Gas
Liquid
66
Polarity is when
the molecule has an unequal distribution of charge
the molecule is positive
the molecule is negative
the charge has nothing to do with polarity
67
How do you find the mole conversion of mass -> moles?
moles / molar mass
22.4 / 1 mole
molar mass / 1 mole
moles / 6.02 x 1023
68
Naming acids: HF
hydrofluoric acid
hydrofluorous acid
fluoric acid
flourous acid
69
Decomposition reactions are when
atoms are swapped
heat is released
one compound breaks into two
chemicals combine
70
Boyle's Law
Temperature and Pressure are constant.
Volume and pressure are inversely proportionate.
Temperature is constant.
Volume and pressure are proportionate.
71
Where do we get the numbers in a mole-to-mole conversion factor (the "mole bridge")?
They are always 1-to-1
Coefficients of a balanced chemical equation
Subscripts of a balanced chemical equation
Textbook, page 260
72
molecular formula is...
the simplest whole number ratio of atoms
the actual number of atoms in a substance
73
TYPES OF CHEMICAL REACTIONS
ACID BASE NEUTRALIZATION
DECOMPOSITION
SYNTHESIS
COMBUSTION
74
What are the correct units for Molarity (M)?
Mass/mL
Moles/L
Moles/mL
Mass/L
75
Which classes of elements can participate in Covalent Bonds?
Only non-metals
Metalloids and Non-metals
Only metals
Metals and Non-metals
76
Neutralization reaction is a special type of which reaction?
Single Displacement
Synthesis
Double Displacement
Combustion
77
What conversion factor is needed to convert 3.87 g of NaCl to moles?
12.46 g/mol
35.45 g/mol
22.99 g/mol
58.44 g/mol
78
Balancing Equations
2NaBr + Cl2 --> 2NaCl + Br2
NaBr + C1 --> NaCl + Br
2NaBr + C12 --> NaCl + 2Br2
NaBr2 + C12 --> NaCl2 + Br2
79
what is the proper mole-to-mole conversion
mol known x [mol known/mol unknown]
mol known/mol unknown
mol unknown/mol known
mol known x [mole unknown/mol known]
