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Spring Final Exam Prep '24 Flashcards | StudBud
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Spring Final Exam Prep '24
Spring Final Exam Prep '24
41 terms
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StudBud Administration
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A fun way to review the chemistry that we have covered throughout the school-year.
Flashcards
41 cards
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Practice quiz
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Host live
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Questions
41
Answers
1
Adding solute to solvent will increase?
boiling point of the solvent
freezing point of the solvent
vapor pressure of the solvent
2
SO
3
The proper name for this compound is?
sulfite
sulfide
sulfur trioxide
sulfate
3
A solution in chemistry is always...?
a homogeneous mixture
possible
a heterogeneous mixture
a pure substance
4
2H
2
+ O
2
--> 2H
2
O How many moles of O
2
are needed to produce 6 moles of water?
1mol
3mol
4mol
6mol
5
How many moles of O
2
are required to react with 33.8g of CH
4
?
135.2
4.20
2.1
8.4
6
Convert 211 kpa into torr
1545 torr
1580 torr
760 torr
101.3 torr
7
Who invented the barometer
Trankina
Avagadro
Torricelli
Daniel Kaiser
8
The nuclear reaction pictured is an example of...?
positron emission
alpha decay
electron capture
beta decay
9
A solution of 100g of KNO
3
at 70*C would be considered?
saturated
dilute
concentrated
unsaturated
10
The representative particle for an ionic compound is?
Trankina
formula unit
ion
molecule
11
T or F... The proper chemical formula for magnesium hydroxide is MgOH
2
true
false
12
H
2
O + H
2
O → H
3
O
+1
+ OH
-1
Which is the conjugate acid in the previous reaction?
H3O+1
OH-1
H2O
13
The reaction in the image is of which type?
all of above
decomposition
synthesis
single replacement
14
The coefficients in a balanced reaction are...
gram ratios
mole ratios
temp ratios
All of the "above"
15
The sulfide ion (-2) is a polyatomic ion.
True
False
16
Choose the empirical formula from the following?
C6H12O4
S2Cl2
Na2SO4
C5H10O5
17
Which of the following elements is not normally a diatomic?
chlorine
helium
iodine
nitrogen
18
The nuclear reaction pictured is...?
positron emission
alpha decay
scudder decay
beta decay
19
The following reaction would be classified as
single replacement.
double replacement.
decomposition.
synthesis.
20
What is the new boiling point of an aqueous solution having a molality of 6.0m? (Kb=0.512
0
C/m)
1030C
11.70C
1060C
3.070C
21
In an acid/base neutralization, an acid + base produces...?
H3O+ and OH-
salt + water
conjugate acid + conjugate base
a really nice tree named Bob
22
What is the molality of a solution when 1.8 moles of NaCl is dissolved in 650g of water?
2.8m
0.0028m
0.56m
5.6m
23
A solution with a pH=2.5 has a pOH of
5.0
11.5
12.5
4.5
24
Calculate [H
3
O
+
] for a solution with a pOH of 3.75?
1.78x10-4M
10.25
0.000056M
5.62x10-11M
25
Which of the following two factors do not represent a directly proportional relationship?
volume and temp
pressure and volume
pressure and temp
26
The following reaction would be classified as
synthesis.
single replacement.
double replacement.
decomposition.
27
What is the [OH
-
] and pH of a solution that is 1x10
-4
M for the H
3
O
+
ion?
pH = 10 and [OH] = 1x10-4M
pH = 4.0 and [OH] = 1x10-10M
pH = 4.0 and [OH] = 1x10-4M
pH = 10 and [OH] = 1x10-10M
28
Increasing the number of collisions per surface area
and
the force of collisions will cause an increase in pressure.
True
False
29
Which of the following compounds contain a polyatomic ion?
phosphorus pentachloride
lead (II) sulfide
magnesium chloride
lithium hydroxide
30
How many of the following solutions are acidic? a) pH=5.9 b) pOH=12 c) [H
+
]=1.2x10
-8
M d) pH=9.4 e) [OH
-
]=7.5x10
-9
M
2
3
4
1
31
An isotope that undergoes beta decay would have its mass number change by?
0
+1
-1
4
32
The following reaction would be classified as
decomposition.
double replacement.
single replacement.
synthesis.
33
Water is a reactant in which type of reaction?
complete ionic
dissociation
net ionic
ionization
34
What is the pH of a solution with a hydronium ion concentration of 6.45x10
-5
M?
7.57
4.19
5.55
9.03
35
Colligative properties depend upon the ____.
number of solute particles in a solution
freezing point of a solute
nature of the solute
nature of the solvent
36
T or F... The limiting reactant is the reactant present in the least amount.
True
False
37
Which definition describes a compound as a proton acceptor?
Arrhenius acid
Bronsted-Lowery acid
Bronsted-Lowery base
Arrhenius base
38
20g of an isotope with a half-life of 3 days is allowed to decay for 12 days. What mass of the isotope would remain?
2.5g
5.0g
0.0g
1.25g
39
What is the new molarity of 500ml of a 4.5M solution if is diluted to 700ml?
3.4m
cannot be determined from given info
3.2M
0.31M
40
Calculate the molarity if you have 10 moles of NaCl in 5000ml of water.
0.3 M
5 M
33 M
2 M
41
To correct for evaporation, the vapor pressure from the water must be subtracted from the barometric pressure.
True
False
