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Chemistry semester 2 review Flashcards | StudBud
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Chemistry semester 2 review
Chemistry semester 2 review
50 terms
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StudBud Administration
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375 plays
This covers everything from semester 2 #chemistry.
Flashcards
50 cards
F
Practice quiz
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Host live
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Questions
50
Answers
1
What can be used to convert between grams and moles?
mole ratio
22.4L/1 mol
molar mass
6.022E23
2
Not retained on filter; tyndall effect is displayed
Time
Solution
Colloid
Suspension
3
Which atom in water has the greatest electronegativity?
Levine
N
H
O
4
In which of the following is solution concentration expressed in terms of molarity?
10 mol solute / 1 L solution
10 mL solute / 1 L solution
10 g solute / 1000 mL solution
10 g solute / 1000 g solution
5
ΔH = -23 kJ
Exothermic
Endothermic
6
H
2
O (g) → H
2
O (l)
Vaporizing, Endothermic
Vaporizing, Exothermic
Condensing, Endothermic
Condensing, Exothermic
7
A gas sample occupies 15 mL at -12°C. What volume is observed at 1.0°C. Pressure is constant.
18 mL
16 mL
22 mL
10 mL
8
If 4 mL of 1 M HCl are diluted to 120 mL, what is the concentration of the dilute solution?
3.33 M
0.333 M
0.0333 M
0.0033 M
9
Ice melts on the floor. Ice is the system.
Exothermic
Endothermic
10
What color is this barn?
Green
Yellow
Red
Blue
11
Not retained on filter; no tyndall effect
Colloid
Solution
Suspension
Time
12
Particles size: less than 1 nm
Colloid
Solution
Whoville
Suspension
13
(l) → (g)
Condensing
Melting
Sublimating
Vaporizing
14
What is the molar mass of Mg(NO
3
)
2
?
118.2 g/mol
183.8 g/mol
148.3 g/mol
134.3 g/mol
15
What is the unit of molar mass?
g/mol
g
mol
mol/g
16
Water's surface tension is ____ most other substances.
Lower than
Squishy and softer than
Higher than
About the same as
17
3 moles of NaOH are in 10 liters of solution. What is the concentration?
0.300 M
30.0 M
3.333 M
13.0 M
18
Pressure is decreased while temperature is held constant. Volume...
Does something timely and romantic. You both fall in love.
Increases
Decreases
Remains the same
19
What is the mass of 2.2x10
22
atoms of copper?
12.8 g
5.165 g
8.41E47 g
2.322 g
20
What color is this dress?
Gold / white
Can we please focus on the real issues?
The internet is stupid.
Blue / black
21
If argon is removed from a sample of air, the pressure...
Decreases
Increases
Catches a small turtle. They become friends.
Does not change
22
(g) → (l)
Condensing
Sublimating
Melting
Vaporizing
23
How many liters does 1.8 mol N
2
occupy at STP?
40.32 L
30.39 L
12.44 L
0.080 L
24
Heat being absorbed by a system.
Exothermic
Endothermic
25
Reactants → Products + Heat
Exothermic
Endothermic
26
A sealed piston is pulled back. The temperature remains constant; pressure inside the piston...
Remains the same
Increases
Decreases
Fills your heart with warmth and love.
27
How many particles are in one mole?
6.022E23
6.022E-23
3.011E-23
3.011E23
28
How many moles are in 240 g of Mg(NO
3
)
2
?
1.428 mol
1.618 mol
0.551 mol
0.618 mol
29
What type of compound is always an electrolyte?
Any homogeneous mixture
Nonpolar covalent
Polar covalent
Ionic
30
How do you feel about the chemistry final?
Like the dog in the picture.
Good
Ok
Great
31
Add coefficients to C
2
H
4
+ O
2
→ CO
2
+ H
2
O
1322
1232
1313
1212
32
ΔH = 23 kJ
Exothermic
Endothermic
33
What increases the rate of dissolving?
Increased temperature.
Decreased particle size.
Increased agitation.
Increased particle size.
34
An electric current would be best conducted by...
Air
Pure water
Salt water
Sugar water
35
STP stands for...
Safety training procedures
Standard time and procedure
Standard temperature and pressure
Suffocate the panda
36
In an equilibrium...
A virus multiplies creating a zombie equilibrium apocalypse.
The reverse reaction is faster than the forward.
The forward reaction is faster than the reverse.
The rate of the forward = the rate of the reverse
37
Which changes the solubility of most solids and liquids?
Love. It's all you need.
Time
Temperature
Pressure
38
A tank at 154 kPa contains 12 kPa O
2
and 23 kPa
He. What is the pressure of the remaining gas?
189 kPa
113 kPa
95.0 kPa
119 kPa
39
If you react 85 g of O
2
with excess H
2
, how many grams of H
2
O will be produced? Balance first.
95.7 g
81.8 g
112 g
77.1 g
40
What remains unchanged when a solution is diluted by the addition of solvent?
Number of moles of solute
Mass of solvent
Volume of solvent
Molarity of solution
41
A piece of metal feels cold. The metal is the system.
Endothermic
Exothermic
42
In a saturated solution at equilibrium...
Rate of dissolving = rate of crystallizing
Rate of dissolving < rate of crystallizing
Rate of dissolving murders the rate of crystallizing.
Rate of dissolving > rate of crystallizing
43
(s) → (g)
Sublimation
Melting
Vaporization
Freezing
44
Which of the following generally occurs as temperature increases.
Increased solid solubility; decreased gas solubility.
Increased solid solubility; increased gas solubility.
Decreased solid solubility; decreased gas solubility.
Decreased solid solubility; increased gas solubility.
45
Heat being released by a system.
Endothermic
Exothermic
46
How many moles of oxygen are required to make 1.33 moles of water? 2H
2
+ O
2
→ 2H
2
O
3.13 mol
0.665 mol
0.519 mol
2.66 mol
47
How much heat is needed to melt 5 moles of solid water? ΔH = 6.01 kJ/mol
0.832 kJ
30.05 kJ
12.01 kJ
28.44 kJ
48
Reactants + Heat → Products
Endothermic
Exothermic
49
Settles upon standing; tyndall effect
Colloid
Suspension
Time
Solution
50
Add coefficients. Cu + Al(NO
3
)
3
→ Al + CuNO
3
1323
1212
3113
1313
