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AP Chemistry
Please place your answers on the answer document provided.
1. A beaker in the laboratory has a volume of 250. mL. What is the volume of the beaker
in liters?
a. 2.50 L
b. 2.00 L
c. 250,000 L d. 0.250 L
2. The density of platinum metal is 21.4 g/cm3 . If you have a piece of platinum with
mass of 11.23 g, what is its volume in cubic centimeters?
a. 240. cm3
b. 0.525 cm3
c. 24.0 cm3
d. 1.91 cm3
3. The number of significant figures in the number 0.002354 is
a. 4
b. 2
c. 3
d. 6
4. The number of significant figures in the number 1.03 x 10-3 is
a. 4
b. 2
c. 3
d. 1
5. If you solve the expression (2.34 + 0.567 + 63.2 = ?), the answer is
a. 66
b. 66.1
c. 66.10
d. 66.107
6. What is the answer to the following expression in the correct number of significant
figures?
 0.0821 0.0230  298.0 
1.50
a. 0.37514227
b. 0.375
c. 0.4
d. 0.38
7. Fourteen carat gold is a mixture of gold and other metals, with gold present to the
extent of 58.3%. If you have a 14-carat gold ring with a mass of 5.63 g, the
mass of gold present is
a. 4.80 g
b. 3.28 g
c. 2.35 g
d. 0.305 g
8. What is the most correct name for P4O10
a.
b.
c.
d.
phosphorus oxide
phosphorus (IV) oxide
tetraphosphorus decoxide
phosphate oxide
e. quadraphosphorus decaoxide
9. You have a jar of chunky peanut butter. Is this a homogeneous or heterogeneous
mixture?
a. heterogeneous
b. homogeneous
10. Which of the following is an alkali metal?
a. Sr
b. Al
c. K
d. Kr
11. How many grams are there in 1.50 moles of sulfur?
a. 21.4 g
b. 64.2 g
c. 32.1 g
d. 48.1 g
AP Chemistry
Please place your answers on the answer document provided.
12. How many moles are there in 16.0 g of aluminum?
a. 0.593 mole
b. 1.69 moles
c. 432 moles
d. 16.0 moles
13. What is the correct formula for a compound formed from the most common ions of
aluminum and sulfur?
a. Al3S2
b. AlS
c. Al3S3
d. Al2S3
14. What is the correct name for Al2(SO4)3?
a. argon sulfate
b. aluminum sulfite
c. aluminum sulfate
d. aluminum sulfide
15. The molar mass of hydrazine, N2H4, is
a. 32.05 g/mol b. 16.03 g/mol
c. 28.00 g/mol
d. 4.08 g/mol
16. What is the most correct name for H2SO4
A. hydrogen sulfate
D. dihydrogen sulfate
B. hydrosulfuric acid
E. sulfurous acid
C. sulfuric acid
17. How many moles are contained in 15.6g of NH4Cl?
a. 0.309 mol
b. 3.43 mol
c. 834 g/mol
d. 0.292 mol
18. What is the weight percent of carbon in oxalic acid, H2C2O4?
a. 13.34%
b. 71.08%
c. 26.68%
d. 2.24%
19. Cyclohexylbenzene has the empirical formula C3H4. Its molar mass is 160.3
grams/mol. Its molecular formula is
a. C3H4
b. C6H8
c. C9H12
d. C12H16
20. Maleic acid, which is used to manufacture artificial resins, has the empirical formula
CHO. Its molar mass is 116.1 g/mol. What is its molecular formula?
a. CHO
b. C2H2O2
c. C3H3O3
d. C4H4O4
21. Nitrogen and oxygen form an extensive series of at least seven oxides with the
general formula N x O y . One of them is a blue solid that comes apart, reversibly, in
the gas phase. It contains 36.84% N. What is the empirical formula of the oxide?
a. N2O
b. NO
c. N2O3
d. NO2
AP Chemistry
Please place your answers on the answer document provided.
Questions 22  27: Match the ions below with their names.
Name
Formulas
22. Sulfate
a. NO3-
23. Acetate
b. HCO3c. NH4+1
24. Nitrate
25. Hydrogen carbonate
26. Phosphate
27. Bicarbonate
e. SO42f. NO21g. SO32h. PO43-
d. CH3COO-
28. A student determines that the molar mass of an unknown compound is 128.40 g/mol.
If the accepted value is 123.87 g/mol, which expression correctly shows the
calculations needed to determine the percent error?
(A) 128.40 - 123.87
(B) 128.40 x 123.87
(C) 128.40
123.87
(D) 128.40 - 123.87
128.40
(E) 123.87 - 128.40
123.87
Questions 52  55: Match the correct name with the formula at the right.
29.
30.
31.
32.
potassium permanganate
sodium hydrogen carbonate
potassium dichromate
sodium bicarbonate
a.
b.
c.
d.
NaOCl
K2CrO4
K2MnO4
NaHCO3
e. Na2CO3
f. PMnO4
g. K2Cr2O7
h. KMnO4
33. Which of the following quantum numbers indicates the orientation?
a. spin
b. angular momentum c. magnetic
d. principle
34. In naming binary covalent compounds, what prefix would be utilized to indicate 7
atoms?
a. septab. hexac. heptad. pentae. deca35. What is the correct chemical formula and charge for the permanganate ion
a. MgO41-
b. MnO31-
c. MnO42-
d. MnO41-
e. MnO43-
AP Chemistry
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36. Aluminum reacts with oxygen to give aluminum oxide. If you have 6.0 moles of
Al,
a. you need 3.0 moles of O2 for complete reaction and produce 2.0 moles of Al2O3
b. you need 18.0 moles of O2 for complete reaction and produce 2.0 moles of Al2O3
c. you need 3.0 moles of O2 for complete reaction and produce 2.0 moles of Al2O3
d. you need 4.5 moles of O2 for complete reaction and produce 3.0 moles of Al2O3
e. you need 6.0 moles of O2 for complete reaction and produce 6.0 moles of Al2O3
37. Which of the following represent a homogeneous mixture?
a. Italian dressing
b. brass
c. raisin pudding
d. cement
e. granite
38. In the balanced molecular equation for the neutralization of sodium hydroxide with
sulfuric acid, the products are:
a.
b.
c.
d.
e.
NaSO4 + H2O
NaSO3 + 2 H2O
2NaSO4 + H2O
Na2S + 2 H2O
Na2SO4 + 2 H2O
39. In a certain experiment 20.0g of HBr and 20.0g of Ca(OH)2 are allowed to react.
How many grams of water form?
a. (20/81) (2/2) (18) g
b. (20/74) (2/2) (18) g
c. (20/81) (2/1) (18) g
d. (20/74) (2/1) (18) g
e. (20/74) (1/2) (18) g
40. In the reaction: 3 Mg + 2FeCl3 → 2Fe + 3MgCl2, how many moles of Iron III
chloride are produced when using 6.75 moles of Magnesium?
a. 4.50 mol
b. 6.75 mol
c. 13.50 mol
d. 3.38 mol
e. 5.45 mol
41. What is the maximum number of electrons that can occupy the 5f sublevel?
a. 2 b. 5 c. 10 d. 14 e. 18
42. What is the maximum number of orbitals in a 4d sublevel?
a. 2 b. 5
c. 10 d. 14 e. 18
43. How many electrons in the ground state of a copper atom have quantum numbers
n=3 and l=2?
a. 2 b. 6
c. 8
d. 10 e. 18
AP Chemistry
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44. Which set of quantum numbers is not allowed?
a. 2, 2, 1, ½
b. 3, 2, 0, ½
c. 4, 3, -3, ½
d. 5, 4, 4, ½
e. 6, 2, -1, ½
45. Which is the correct ground state electron configuration for the Ag atom?
a. [Kr] 4d10 5s1
b [Kr] 4d9 5s2
c. [Kr] 4d8 5s2
d. [Ar] 3d10 4s1
e. [Ar] 3d9 5s2
46. The maximum number of electrons in an atom that can have quantum numbers n=4,
l=2 is:
a. 2
b. 6
c. 8
d. 10
e. 14
47. ___CuFeS2 + ___O2 → ___Cu2S + ___FeO + ___SO2
When the half-reaction above is balanced, what is the coefficient for O2 if all the
coefficients are reduced to the lowest whole number?
a. 2
b. 3
c. 4
d. 6
e. 8
48. If C4H10O undergoes complete combustion, what are the coefficients when the
equation is completed and balanced?
a.
2, 5, 7, 5
b.
1, 6, 4, 5
c.
2, 4, 4, 5
d.
1, 5, 4, 9
e.
4, 12, 8, 10
49. In the reaction: 3 Mg + 2FeCl3 → 2Fe + 3MgCl2, how many moles of
Iron III chloride are produced when using 6.75 moles of Magnesium?
a. 4.50 mol
b. 6.75 mol
c. 13.50 mol
d. 3.38 mol
e. 5.45 mol
50. In the lab, Percent yield of Copper, what device did you use as a safety precaution for
the dangerous fumes produced in the reaction?
a. fan
b. mask
c. gloves
d. fume hood