Exam
Name___________________________________
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1) What species is represented by the following information?
p+ = 17
n° = 18
A) Ar
1)
e- = 18
B) Kr
C) Cl-
2) Predict the charge that an aluminum ion would have.
A) 1+
B) 5C) 1-
D) Ar+
E) Cl
D) 2+
E) 3+
3) A 14.01 g sample of N2 reacts with 3.02 g of H 2 to form ammonia (NH3 ). If ammonia is the only
product, what mass of ammonia is formed?
A) 1.10 g
B) 17.03 g
C) 23.07 g
D) 3.02 g
2)
3)
E) 14.01 g
4) Which of the following is an ionic compound?
A) SCl2
4)
B) Cl2 O
C) Mg3 (PO4 )2
D) PF5
E) CH2 O
5) Write the formula for barium nitrite.
A) Ba3 N 2
B) Ba(NO2 )2
C) BaNO3
D) B(NO2 )3
E) BN
5)
6) Write the name for Sn(SO4 )2. Remember that Sn forms several ions.
6)
7) Write a balanced equation to show the reaction of aqueous aluminum acetate with aqueous
ammonium phosphate to form solid aluminum phosphate and aqueous ammonium acetate.
A) Al(CO2 )3 (aq) + (NH4 )3 PO3 (aq)
AlPO3 (s) + 3 NH4 CO 2 (aq)
7)
A)
B)
C)
D)
E)
tin sulfide
tin (II) sulfite
tin (I) sulfate
tin (I) sulfite
tin (IV) sulfate
B) Al(C2 H3 O2 )2 (aq) + (NH4 )2 PO4 (aq)
AlPO4 (s) + 2 NH 4C2H 3 O3 (aq)
C) Al(CO3 )2 (aq) + (NH3 )2 PO4 (aq)
AlPO4 (s) + 2 NH3 CO 3 (aq)
D) Al(C2 H3 O2 )3 (aq) + (NH4 )3 PO4 (aq)
E) Al(C2 H3 O2 )2 (aq) + (NH3 )2 PO4 (aq)
AlPO4 (s) + 3 NH 4C2H 3 O3 (aq)
AlPO4 (s) + 2 NH 3C2H 3 O3 (aq)
1
8) How many N2O4 molecules are contained in 76.3 g N 2O4 ? The molar mass of N2 O4 is 92.02
8)
g/mol.
A) 7.26 × 1023 N2 O4 molecules
B) 5.54 × 1025 N2 O4 molecules
C) 1.38 × 1024 N2 O4 molecules
D) 4.59 × 1025 N2 O4 molecules
E) 4.99 × 1023 N2 O4 molecules
9) Determine the empirical formula for a compound that is 36.86% N and 63.14% O by mass.
A) NO3
B) N2 O
C) NO2
D) N2 O3
E) NO
10) According to the following balanced reaction, how many moles of NO are formed from 8.44 moles
of NO2 if there is plenty of water present?
3 NO2 (g) + H2 O(l)
A)
B)
C)
D)
E)
9)
10)
2 HNO3 (aq) + NO(g)
1.83 moles NO
2.81 moles NO
5.50 moles NO
8.44 moles NO
25.3 moles NO
11) According to the following reaction, how many grams of sulfur are formed when 37.4 g of water
are formed?
2 H2 S(g) + SO2 (g)
3 S(s) + 2H2 O(l)
A) 56.1 g S
B) 66.6 g S
C) 99.8 g S
D) 14.0 g S
11)
E) 44.4 g S
12) Determine the percent yield of a reaction that produces 28.65 g of Fe when 50.00 g of Fe 2O3 react
12)
with 17.82g Al according to the following reaction.
Fe2 O3 (s) + 2 Al(s)
A) 20.02 %
B) 61.03 %
Al2 O3 (s) + 2 Fe(s)
C) 28.65 %
D) 57.30 %
E) 81.93 %
13) Determine the molarity of a solution formed by dissolving 468 mg of MgI 2 in enough water to
yield 50.0 mL of solution.
A) 0.0107 M
B) 0.0337 M
C) 0.0297 M
D) 0.0936 M
14) How many moles of LiI are contained in 258.6 mL of 0.0296 M LiI solution?
A) 7.65 × 10-3 mol
B) 1.31 × 10-3 mol
C) 3.67 × 10-3 mol
D) 8.74 × 10-3 mol
E) 1.14 × 10-3 mol
2
13)
E) 0.0651 M
14)
15) Determine the concentration of a solution prepared by diluting 25.0 mL of a stock 0.188 M
Ca(NO3 )2 solution to 150.0 mL.
15)
16) What volume (in mL) will a sample of F2 gas occupy in a syringe at 5.5 atm, if the F 2 has a volume
16)
A) 0.0501 M
B) 1.13 M
of 25.0 mL at 1.2 atm?
A) 3.8 mL
B) 11 mL
C) 0.0313 M
C) 5.5 mL
D) 0.0887 M
D) 7.6 mL
E) 0.0199 M
E) 17 mL
17) To what volume will a sample of gas expand if it is heated from 50.0 C and 2.33 L to 500.0°C?
A) 4.38 L
B) 17.9 L
C) 9.74 L
D) 10.3 L
E) 5.58 L
17)
18) Determine the density of CO 2 gas at STP.
18)
A) 4.46 g/L
B) 1.96 g/L
C) 1.80 g/L
D) 2.24 g/L
E) 5.10 g/L
19) A gas mixture contains CO, Ar and H2 . What is the total pressure of the mixture, if the mole
19)
fraction of H2 is 0.35 and the pressure of H2 is 0.58 atm?
A) 2.1 atm
B) 0.20 atm
C) 1.7 atm
D) 0.60 atm
E) 0.49 atm
20) Which of the following statements is TRUE?
A) The larger a molecule, the faster it will effuse.
B) At very high pressures, a gas will occupy a larger volume than predicted by the ideal gas
law.
C) For a given gas, the lower the temperature, the faster it will effuse.
D) Particles of different masses have the same average speed at a given temperature.
E) None of the above statements are true.
20)
21) Which of the following (with specific heat capacity provided) would show the smallest
temperature change upon gaining 200.0 J of heat?
A) 50.0 g Al, CAl = 0.903 J/g°C
21)
B) 50.0 g Cu, CCu = 0.385 J/g°C
C) 25.0 g Ag, CAg = 0.235 J/g°C
D) 25.0 g granite, Cgranite = 0.79 J/g°C
E) 25.0 g Au, CAu = 0.128 J/g°C
22) Calculate the amount of heat (in kJ) necessary to raise the temperature of 47.8 g benzene by 57 K.
The specific heat capacity of benzene is 1.05 J/g°C
A) 2.59 kJ
B) 1.61 kJ
C) 3.85 kJ
D) 2.86 kJ
E) 16.6 kJ
22)
23) Which of the following types of electromagnetic radiation has the shortest wavelength?
A) blue
B) yellow
C) orange
D) green
E) violet
23)
24) Which of the following transitions (in a hydrogen atom) represent absorption of the smallest
frequency photon?
A) n = 5 to n = 6
B) n = 1 to n = 2
C) n = 5 to n = 4
D) n = 4 to n = 1
E) n = 1 to n = 3
24)
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25) In which orbital below would an electron (on average) be closest to the nucleus?
A) 2s
B) 3p
C) 5d
D) 4s
E) 2p
25)
26) Which of the following signs on q and w represent a system that is doing work on the
surroundings, as well as losing heat to the surroundings?
A) q = -, w = +
B) q = - , w = C) q = +, w = D) q = +, w = +
E) None of these represent the system referenced above.
26)
27) Use the ∆H°f information provided to calculate ∆H°rxn for the following:
27)
∆H°f (kJ/mol)
SO2 Cl2 (g) + 2 H 2 O(l)
2 HCl(g) + H 2 SO4(l)
∆H rxn = ?
SO2 Cl2 (g)
-364
H2 O(l)
-286
HCl(g)
H2 SO4 (l)
-92
-814
A) -256 kJ
B) -62 kJ
C) -422 kJ
28) Place the following in order of increasing radius.
Br
A)
B)
C)
D)
E)
Na
E) +800. kJ
28)
Rb
Rb < Br < Na
Br < Na < Rb
Na < Rb < Br
Rb < Na < Br
Br < Rb < Na
29) Place the following in order of decreasing bond length.
H-F
A)
B)
C)
D)
E)
D) +161 kJ
H-I
H-Br
H-I > H-F > H-Br
H-F > H-I > H-Br
H-Br > H-F > H-I
H-F > H-Br > H-I
H-I > H-Br > H-F
4
29)
30) Draw the Lewis structure for NO 2 including any valid resonance structures. Which of the
30)
following statements is TRUE?
A) The nitrite ion contains two N-O single bonds.
B) The nitrite ion contains one N-O single bond and one N=O double bond.
1
C) The nitrite ion contains two N-O bonds that are equivalent to 1 bonds.
2
D) The nitrite ion contains two N=O double bonds.
E) None of the above are true.
31) Place the following in order of increasing A-X bond angle, where A represents the central atom
and X represents the outer atoms in each molecule.
HCN
H2 O
31)
H3 O
A) H2 O < HCN < H3 O
B) H2 O = H3 O < HCN
C) HCN < H3 O < H2O
D) H2 O < H3 O < HCN
E) H3 O < H2O < HCN
32) Determine the electron geometry (eg), molecular geometry (mg), and polarity of SO 3 .
A) eg=tetrahedral, mg=trigonal pyramidal, polar
B) eg= trigonal bipyramidal, mg=trigonal planar, polar
C) eg=trigonal planar, mg=trigonal planar, nonpolar
D) eg=trigonal pyramidal, mg=bent, nonpolar
E) eg=tetrahedral, mg=tetrahedral, nonpolar
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32)