Download Chemistry MSL Practical Style Review 1. What is the nuclear

Chemistry MSL Practical Style Review
1. What is the nuclear composition of uranium-235?
A
B
C
D
92 electrons + 143 protons
92 protons + 143 electrons
143 protons + 92 neutrons
92 protons + 143 neutrons
2. Which best describes the relationship between subatomic particles in any neutral atom?
A
B
C
D
The number of protons equals the number of electrons.
The number of protons equals the number of neutrons.
The number of neutrons equals the number of electrons.
The number of neutrons is greater than the number of protons.
3.What is the name of the compound PbO ?
A
B
C
D
lead oxide
lead(II) oxide
lead oxide(II)
lead(IV) oxide
4. What is the chemical formula for calcium nitrate?
A
B
C
D
CaNO3
Ca(NO2)2
Ca(NO3)2
Ca3N2
5. Which is the correct formula for dinitrogen pentoxide?
A
B
C
D
N4O
NO2
N2O5
NO4
6. What is the pressure, in atmospheres, exerted by a 0.100-mol sample of oxygen in a 2.00-L
container at 273C?
A
B
C
D
4.48 x10-1 atm
2.24 x 100 atm
1.12 x 103 atm
2.24 x103 atm
7. Based on the VSEPR theory, what is the molecular geometry of a molecule of PI3 ?
A
B
C
D
linear
tetrahedral
trigonal planar
trigonal pyramidal
8. Which substance listed in the table is a liquid at 27 C?
I
II
III
IV
A
B
C
D
Melting
Point
28C
-10C
20C
-90C
Boiling
Point
140C
25C
140C
14C
I
II
III
IV
9. The total pressure in a closed vessel containing N2, O2 and CO2 is 30 atm. If the partial
pressure of N2 is 4 atm, and the partial pressure of O2 is 6 atm, what is the partial pressure of
CO2?
A
B
C
D
20 atm
30 atm
40 atm
50 atm
10. What type of bonding is associated with compounds that have the following characteristics:
•high melting points
•conduct electricity in the molten state
•solutions conduct electricity
•normally crystalline solids at room temperature.
A
B
C
D
covalent
ionic
hydrogen
metallic
11. Consider this reaction:
NH3 (g) + HCl (g) → NH4Cl (s)
Which type of reaction does this equation represent?
A
B
C
D
combustion
decomposition
single replacement
synthesis
12. What products are formed when the metal potassium is added to water?
A
B
C
D
K and H2O
KOH and H2O
K2O and H2
KOH and H2
13. What coefficients are required to balance this equation?
_Fe2O3 _CO _Fe _CO2
A
B
C
D
2, 6, 3, 6
1, 3, 2, 3
1, 1, 2, 2
1, 1, 2, 1
14. An aqueous solution of silver nitrate is added to an aqueous solution of iron (II) chloride.
Which is the net ionic equation for the reaction that occurs?
A
B
C
D
AgNO2 (aq) + FeCl (aq)→ AgCl (s) + FeNO2 (aq)
2AgNO3 (aq) + FeCl2 (aq)→2AgCl (s) + Fe(NO3)2 (aq)
2Ag+1 (aq) + NO3-1 (aq) + Fe+2 (aq) + Cl2 (g)→ 2AgCl (s)
2Ag+ (aq) + 2Cl- (aq)→ 2AgCl (s)
15. Consider this chemical equation:
NH3 (aq) + HCl (aq)  NH4+ (aq) + Cl- (aq)

In this reaction, why is the ammonia considered a base?
A
B
C
D
NH3 increases the hydronium ion concentration.
NH3 decreases the hydroxide ion concentration.
NH3 accepts a proton.
NH3 donates a proton.
16. What is the pH of a solution of KOH with a hydroxide concentration of [OH] = 1 × 10−4 M?
A
B
C
D
- 10
-4
4
10
17. In a titration experiment, if 30.0 mL of an HCl solution reacts with 24.6 mL of a 0.50-M
NaOH solution, what is the concentration of the HCl solution?
A
B
C
D
0.41 M
0.61 M
1.5 M
370 M
18. For the reaction
A+ (aq) + B- (aq) → AB (s)
increasing the temperature increases the rate of the reaction. Which is the best explanation for
this happening?
A
B
C
D
The pressure increases, which in turn increases the production of products.
The concentration of reactants increases with an increase in temperature.
The average kinetic energy increases, so the likelihood of more effective collisions
between ions increases.
Systems are more stable at high temperatures.
19. Which is a unique characteristic of the bonding between metal atoms?
A
B
C
D
Atoms require additional electrons to reach a stable octet.
Atoms must give away electrons to reach a stable octet.
Atoms share valence electrons only with neighboring atoms to reach a stable octet.
Delocalized electrons move among many atoms creating a sea of electrons.
20. Consider this phase diagram:
At what temperature does the normal boiling point occur?
A
B
C
D
45°C
60°C
100°C
110°C