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Duplicate of SAT Chemistry Review
Duplicate of SAT Chemistry Review
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SAT style practice for the chemistry subject test #chemistry
Flashcards
26 cards
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Practice quiz
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Questions
26
Answers
1
Which of the following would experience ONLYLondon Dispersion intermolecular force between them
2 molecules of HCl
2 molecules of H2S
2 molecules of CH3OH
2 molecules of C3H8
2
When this equation is balanced with (lowest whole numbers) the coefficient for O
2
12
9
8
6
3
In VSEPR theory, the electrostatic repulsion between e- pairs surrounding an atom causes
an electron sea to form.
these pairs to be separated as far as possible.
positive ions to form.
light to reflect.
4
Which aspect of the graph provides the best evidence that the reaction is exothermic
The potential energy at point 2
The energy difference between points 1 and 3
the time needed to react point 3
The energy difference between points 1 and 2
5
Which element is the most electronegative of all the elements?
Ca, calcium
F, fluorine
Al, aluminum
C, carbon
6
Which phase change is accompanied by a release of heat (energy)?
H2O(l) -> H2O(s)
H2O(l) -> H2O(g)
H2O(s) -> H2O(g)
H2O(s) -> H2O(l)
7
Which of the two following fomulas DOES NOT match the names provided after?
NO2 (Nitrogen dioxide)
CBr4 (Carbon Tetrabromide)
Mg2S (Magnesium Sulfide)
CuSO4 (Copper (II) Sulfate)
8
When magnesium (Mg) reacts with chlorine (Cl) the atoms combine in a 1 to 2 ratio to form MgCl
2
False
True
9
Calc. # of moles of AlO that are produced in 0.60 mol of Fe. 2Al(
s
) + 3FeO(
s
) 3Fe(
s
) + AlO(
s
)
0.90 mol
0.60 mol
0.40 mol
0.20 mol
10
What phase change is endothermic?
deposition
melting
condensation
freezing
11
A decrease in the volume of the sealed reaction container will shift the equilibrium toward NO
2
False
True
12
CCl
4
is insoluble in water BC water molecules contain polar bonds and the solute is non-polar
Correct explanation
Incorrect explanation
13
Evaporation of water results in an increase in entropy
False
True
14
Which of the following represents a Brønsted-Lowry conjugate acid-base pair?
CO32- and CO
H3O+ and H2O
NH4+ and NH4-
SO32-and SO2
15
Particles vibrate faster and faster until some break from their fixed positions and move freely
Relationship between volume and temp at a constant pressure
Relationship between temp and the kinetic energy of particls
Solid phase changing to the liquid phase
A state in which the liquid/gas phases are in equilibrium
16
Evaporation increases entropy BECAUSE molecules are distributed more randomly in the gas state
Correct explanation
Incorrect explanation
17
If the volume on a buret can be read to the nearest 0.01 mL then 20 mL is recorded as 20.00 mL
True
False
18
It is standard practice to record data to two decimal places
True
False
19
Carbon tetrachloride (CCl
4
) is insoluble in water
False
True
20
Water molecules have lone pairs of electrons that repel bonding electrons.
True
False
21
Each magnesium atom gains two electrons and each chlorine atom loses one electron
False
True
22
What is the mole ratio of H
2
SO
4
to sodium sulfate
1:1
2:1
1:2
1:0
23
Which element reacts with oxygen an a 2:3 ratio of element to oxygen, producing X
2
O
3
Ca, calcium
Al, aluminum
F, fluorine
C, carbon
24
Which of the following describes the shape of an ammonia molecule?
Trigonalpyramidal
Trigonal planar
T-shaped
Tetrahedral
25
What is the shape of CO
2
tetrahedral
linear
bent
trigonal planar
26
Water molecules are _____ and have what type of intermolecular force?
polar and have hydrogen bonding forces
polar and have London dispersion forces
nonpolar and have London dispersion forces
polar and have dipole dipole forces
