Chem FINAL
109) If you had an aqueous mixture that contained Ag+, K+, and Pb2+ cations, how many different solids could precipitate if a chloride solution was added? A) 1 B) 2 C) 3 D) 4 E) no solids will precipitate
B) 2
150) How many subshells are there in the n = 2 principal shell? A) 1 B) 2 C) 3 D) 4 E) not enough information
B) 2
33) How many significant figures should be reported in the answer to the following calculation? (43.980) × (19.0023 + 25) = A) 3 B) 2 C) 4 D) 1 E) none of the above
B) 2
79) How many C atoms are in ammonium acetate? A) 5 B) 2 C) 1 D) 3 E) none of the above
B) 2
51) What is the final temperature of 25.0 grams of water at 22.0°C after it absorbs 454 of heat? A) 17.7 B) 4.29 C) 26.3 D) 15.8 E) none of the above
C) 26.3
163) How many core electrons are in a ground state atom of arsenic? A) 15 B) 33 C) 28 D) 5 E) none of the above
C) 28
101) The mass of one mole of carbon dioxide is ________ g. A) 28.01 B) 384.4 C) 32.00 D) 44.01 E) none of the above
D) 44.01
147) Which color of the visible spectrum has photons with the most energy? A) red B) orange C) green D) violet E) yellow
D) violet
77) Suppose that in an ionic compound, "M" represents a metal that could form more than one type of ion. In the formula MP , the charge of the M ion would be: A) +1 B) -1 C) +2 D) -3 E) +3
E) +3
54) Which one of the following is a main-group nonmetal element in period number 3 of the periodic table? A) bromine B) selenium C) sodium D) gallium E) sulfur F) none of the above
E) sulfur
53) The elemental symbol Mn represents the element ________. A) mendelevium B) magnesium C) molybdenum D) manganese E) meitnerium F) none of the above
Manganese
38) How many are in 2.20 ? A) 36.1 B) 10.6 C) 0.1340 D) 7.45 E) none of the above
E) none of the above
89) How many atoms of lithium are in 18.7 g? A) B) C) D) E) none of the above
1.62 x 10^24
22) The decimal value 0.01 is equal to which exponential? A) B) C) D) E) none of the above
10^-2
21) The decimal value 10 is equal to which exponential? A) B) C) D) E) none of the above
10^1
84) How many atoms are present in 4.5 moles? A) B) C) D) E) none of the above
2.7 x 10^24
78) Suppose that in an ionic compound, "M" represents a metal that could form more than one type of ion. In the formula MF2 , the charge of the M ion would be: A) +2 B) -1 C) +4 D) -2 E) +1
A) +2
138) Consider the following reaction: 2 Mg + O2 → 2 MgO △H rxn = -1203 kJ Calculate the amount of heat (in kJ) associated with complete reaction of 4 moles of Mg. A) -1203 kJ B) -2406 kJ C) -601.5 kJ D) -4812 kJ E) none of the above
A) -1203 kJ
34) The prefix micro represents which multiplier? A) 0.000001 B) 1,000,000 C) 0.001 D) 1,000 E) none of the above
A) 0.000001
100) How many moles of Pb are in 4.71 × 1021 Pb atoms? A) 0.00782 B) 2.84 × 1045 C) 207.2 D) 6.022 × 1023 E) none of the above
A) 0.00782
39) What is the density of 96 mL of a liquid that has a mass of 90.5 g? A) 0.94 g
A) 0.94 g
20) The exponential 10^4 is equal to which decimal number? A) 10,000 B) 1 C) 10 D) 100 E) none of the above
A) 10,000
57) How many neutrons are found in Ne-21? A) 11 B) 21 C) 10 D) 0 E) none of the above
A) 11
191) How many grams of LiF would be present in 575 mL of 0.750 M LiF solution? A) 11.2 B) 0.0338 C) 1.12 × 104 D) 19.9 E) 33.8
A) 11.2
196) How many mL of 0.218 M sodium sulfate react with exactly of BaC given the reaction: Ba (aq) + N S (aq) → BaS (s) + 2NaCl (aq) A) 13.1 B) 5.52 C) 24.6 D) 2.86 E) none of the above
A) 13.1
80) How many O atoms are present in sodium chlorite? A) 2 B) 6 C) 4 D) 1 E) none of the above
A) 2
55) What is the charge on an ion that has an atomic number of 24 and contains 22 ? A) 2+ B) 2- C) 1+ D) 1- E) none of the above
A) 2+
83) Bananas cost 33¢ per pound. If you spent $0.77, how many pounds of bananas did you purchase? A) 2.33 B) 1.73 C) 0.429 D) 2.01 E) none of the above
A) 2.33
93) Given that sodium chloride is 39.0% sodium by mass, how many grams of sodium chloride are needed to have of Na present? A) 2.44 B) 0.371 C) 2,430 D) 37.1 E) none of the above
A) 2.44
208) Which solution below would be considered the most acidic? A) 2.9 × 10 -4 M HCl B) 4.5 × 10 -5 M HNO3 C) 1.0 × 10 -7 M NaCl D) 1.5 × 10 -2 M KOH E) none of the above
A) 2.9 × 10 -4 M HCl
143) If the theoretical yield of the reaction below corresponds to 25.3 g and the percent yield of the reaction is known to be reproducibly 81.1%, calculate the actual yield. Given: O + O → 2 LiOH A) 20.5 g B) 48.9 g C) 45.8 g D) 81.1 g E) none of the above
A) 20.5 g
87) What is the mass of sulfur atoms? A) 208 B) 4.93 C) 155 D) 32.07 E) none of the above
A) 208
91) What is the mass (in grams) of 3.03 × 1024 molecules of carbon dioxide molecules? A) 221 B) 0.114 C) 1.33 D) 44.01 E) none of the above
A) 221
44) What is the value of -25°C on the Kelvin scale? A) 248 B) -32 C) -13 D) -298 E) none of the above
A) 248
59) If an isotope of an element has 27 neutrons and a mass number of 52 , how many electrons must it have? A) 25 B) 27 C) 52 D) 79 E) none of the above
A) 25
30) How many significant figures should be reported in the answer to the following calculation? (8.50) × (29.0) × (1.0947) = A) 3 B) 2 C) 4 D) 5 E) none of the above
A) 3
32) How many significant figures should be reported in the answer to the following calculation? (4.921) + (16.2) = A) 3 B) 2 C) 1 D) 4 E) none of the above
A) 3
182) If the solubility of sodium chloride is 36 grams per 100 grams of water, which of the following solutions would be considered unsaturated? A) 5.8 moles of NaCl dissolved in 1 L of water B) 3.25 moles of NaCL dissolved in 500 ml of water C) 1.85 moles of NaCl dissolved in 300 ml of water D) none of the above
A) 5.8 moles of NaCl dissolved in 1 L of water
96) What is the correct value for Avogadro's number? A) 6.022 × 10^23 B) 6.022 × 1033 C) 6.023 × 1022 D) 6.022 × 102.3 E) none of the above
A) 6.022 × 10^23
45) What is the value of 23°C on the Fahrenheit scale? A) 73 B) 52 C) 59 D) 81
A) 73
144) Consider a reaction of chemicals depicted as A + B → C + D. Suppose reaction of 17.8 grams of A with 29.5 grams of B gave 24.7 grams of C. However, the theoretical yield of C for this reaction was 33.3 grams. What was the percent yield of chemical C? A) 74.2 B) 47.3 C) 11.7 D) 135 E) none of the above
A) 74.2
72) What is the formula mass of sulfurous acid? A) 82.08 amu B) 98.08 amu C) 83.09 amu D) 66.08 amu E) none of the above
A) 82.08 amu
194) What volume of 9.00 M nitric acid is needed to make of solution? A) 903 mL B) 1.73 L C) 1.10 L D) 748 mL E) none of the above
A) 903 mL
10) Which of the following is an example of a scientific law? A) All matter is composed of small, indestructible particles called atoms. B) In a chemical reaction, matter is neither created nor destroyed. C) When a can of soda pop is opened, a fizzing sound is heard. D) Flammable objects contain phlogiston. E) none of the above
A) All matter is composed of small, indestructible particles called atoms.
66) What is the formula for an ionic compound made of barium and nitrogen? A) Ba3N2 B) Ba2N3 C) BaN D) Ba2N4 E) none of the above
A) Ba3N2
160) Which of the following atoms has the greatest metallic character? A) Cs B) Be C) Cu D) Ti E) Au
A) Cs
15) Which statement accurately describes the purpose of experiments? A) Experiments are designed to produce the results predicted by a theory. B) Experiments can be replaced by a simple, logical reasoning of known facts. C) Experiments are designed to produce unexplainable results for further investigation. D) Experiments look for other observable predictions of a theory. E) none of the above
A) Experiments are designed to produce the results predicted by a theory.
48) Given the table of specific heat values below, what is the identity of a 10.0 g metal sample that increases by when of energy is absorbed? Au 0.128 Ag 0.235 Cu 0.385 Fe 0.449 Al 0.903 A) Fe B) Al C) Au D) Ag E) none of the above
A) Fe
49) Given the table of specific heat values below, what is the identity of a 26.2 g metal sample that increases by 8.5°C when 100.0 J of energy is absorbed? Element Specific Heat(J/g°C) Au -0.128 Ag -0.235 Cu -0.385 Fe -0.449 Al -0.903 A) Fe B) Al C) Au D) Ag E) none of the above
A) Fe
16) Which of the following would be considered a theory? A) Glass is fragile. B) Hot air rises. C) Gasoline has a very strong odor. D) Helium balloons float because helium is less dense than air.
A) Glass is fragile.
112) What is the complete ionic equation for the reaction of hydrochloric acid with potassium hydroxide? A) H+ + Cl- + K+ + OH- → H2O + K+ + Cl- B) H+ + Cl- + K+ + OH- → 2H+ + O2- + K+ + Cl- C) H+ + OH- → H2O D) 2H+ +2Cl- + K2+ + 2OH- → H2O + K2+ +2 Cl- E) none of the above
A) H+ + Cl- + K+ + OH- → H2O + K+ + Cl-
152) "When filling orbitals of equal energy, electrons fill them singly first with parallel spins." This is known as: A) Hund's rule. B) Pauli exclusion principle. C) Bohr's model. D) Ground state. E) none of the above
A) Hund's rule.
12) Who discovered the atomic theory? A) John Dalton B) Antoine Lavoisier C) Nivaldo Tro D) John Dalton and Antoine Lavoisier E) none of the above
A) John Dalton
159) Which of the following atoms has the least metallic character? A) Li B) Na C) K D) Rb E) Cs
A) Li
157) Which of the following elements has the lowest ionization energy? A) Rb B) Na C) C D) F E) He
A) Rb
146) Which among the following statements is TRUE? A) The wavelength of light is inversely related to its energy. B) As the energy increases, the frequency of radiation decreases. C) As the wavelength increases, the frequency also increases. D) Red light has a shorter wavelength than violet light. E) none of the above
A) The wavelength of light is inversely related to its energy.
197) The Bronsted-Lowry definition of an acid is: A) a proton donor. B) a proton acceptor. C) produces H⁺ in solution. D) produces OH⁻ in solution. E) none of the above
A) a proton donor.
68) What is the name of CoS? A) cobalt(II) sulfide B) cobalt sulfide C) cobalt monosulfide D) cobaltous sulfur E) none of the above
A) cobalt(II) sulfide
174) What is the angle between electron groups in the tetrahedral geometry? A) 90° B) 109.5° C) 120° D) 180° E) not enough information
B) 109.5°
141) How many grams of water are needed to react with 27.2 grams of O? Given: O + O → 2 LiOH A) 0.910 B) 16.4 C) 1.51 D) 38.94 E) none of the above
B) 16.4
184) The solubility of solids in water: A) is independent of pressure above solution. B) increases with increasing pressure above solution. C) decreases with increasing pressure above solution. D) Solids are not soluble in water. E) none of the above
A) is independent of pressure above solution.
175) What is the electron geometry if you have 2 electron groups around the center atom? A) linear B) trigonal planar C) tetrahedral D) trigonal bipyramidal E) not enough information
A) linear
114) What type of a reaction occurs when potassium metal reacts with fluorine gas? A) precipitation B) acid-base neutralization C) oxidation-reduction D) gas evolution E) no reaction
A) precipitation
74) A compound has a formula mass of 61.98 amu and is comprised of atoms of sodium and oxygen in a definite ratio. The name of the compound described here is: A) sodium monoxide. B) disodium oxide. C) sodium oxide. D) sodium dioxide. E) none of the above
A) sodium monoxide.
117) A redox reaction has occurred ________. A) when a substance reacts with elemental oxygen B) when an alkali metal reacts with an alkaline earth metal C) when one substance transfers protons to another D) when one substance forms a solid E) when all of the above occur
A) when a substance reacts with elemental oxygen
24) How would the number 8,155 be written in scientific notation? A) B) C) D) E) none of the above
A)8.155 x 10^3
2) Which of the following items does NOT contain chemicals? A) drain cleaner B) organically grown vegetables C) air D) insecticides E) All of the above contain chemicals.
All of the above contain chemicals.
23) The exponential 10^-3 is equal to which decimal number? A) 0.1 B) 0.001 C) -0.00001 D) -0.0001 E) none of the above
B) 0.001
192) A 0.15 M solution of BaCl2 contains: A) 0.15 M Ba2+ ions and 0.15 M Cl- ions. B) 0.15 M Ba2+ ions and 0.30 M Cl- ions. C) 0.30 M Ba2+ ions and 0.15 M Cl- ions. D) 0.30 M Ba2+ ions and 0.30 M Cl- ions. E) none of the above
B) 0.15 M Ba2+ ions and 0.30 M Cl- ions.
42) How many Calories are in 575.0 calories? A) 575,000 B) 0.5750 C) 137.6 D) 2,404 E) none of the above
B) 0.5750
193) A 90.0 g sample of NaOH is dissolved in water and the solution is diluted to give a final volume of 3.00 liters. The molarity of the final solution is ________. A) 0.500 M B) 0.750 M C) 1.00 M D) 2.25 M E) none of the above
B) 0.750 M
76) If the mass ratio of K to F in a compound is 2.06:1, how many grams of F are needed to react with 2.30 of K? A) 0.877 B) 1.12 C) 0.112 D) 8.77 E) none of the above
B) 1.12
106) What are the coefficients for the following reaction when it is properly balanced? ___potassium iodide + ___lead (II) acetate → ___lead (II) iodide +___potassium acetate A) 2, 1, 1, 1 B) 2, 1, 1, 2 C) 3, 2, 2, 1 D) 1, 1, 2, 2 E) none of the above
B) 2, 1, 1, 2
37) How many inches are in 6.32 cm? A) 16.1 B) 2.49 C) 3.78 D) 8.86 E) none of the above
B) 2.49
40) What is the volume of 19.6 g of a liquid that has a density of 0.967 g mL? A) 16.9 mL B) 20.3 mL C) 14.7 mL D) 17.9 mL E) none of the above
B) 20.3 mL
95) What is the mass percent of oxygen in sodium oxide? A) 37.1 B) 25.8 C) 74.2 D) 62.0 E) none of the above
B) 25.8
36) The metric prefix k would be presented as 10 to the power of: A) -3 B) 3 C) 12 D) -9
B) 3
195) How much water would you ADD to 175 mL of 6.00 M hydrochloric acid to prepare a 2.00 M solution of this acid? A) 525 mL B) 350 mL C) 58.3 mL D) 700. mL E) none of the above
B) 350 mL
85) If you have atoms of copper, how many moles of copper do you have? A) 0.250 B) 4.00 C) 0.600 D) 3.00 E) none of the above
B) 4.00
86) How many moles of potassium are in 156.4 g? A) 39.10 B) 4.000 C) 0.2500 D) 5.050 E) none of the above
B) 4.000
41) A sample of 508.4 grams of copper completely reacted with oxygen to form 572.4 grams of a copper oxide product. How many grams of oxygen must have reacted? A) 636.4 B) 64.0 C) 32.0 D) 572.4 E) 508.4 F) none of the above
B) 64.0
67) What is the formula for an ionic compound made of aluminum and oxygen? A) AlO2 B) Al2O3 C) Al3O2 D) AlO E) none of the above
B) Al2O3
9) Who discovered the law of conservation of mass? A) John Dalton B) Antoine Lavoisier C) Nivaldo Tro D) John Dalton and Antoine Lavoisier E) none of the above
B) Antoine Lavoisier
60) Given that the molecular mass of bromine is 79.90 grams, which of the following isotopes would you expect to have the greatest natural abundance? A) Br-79 B) Br-80 C) Br-81 D) Br-82 E) none of the above
B) Br-80
173) Which one of the following molecules is NOT capable of having resonance structures? A) SeO2 B) H2O C) SO2 D) O3 E) none of the above
B) H2O
198) What is the conjugate acid of OH⁻? A) B) H2O C) NaOH D) OH⁻ E) none of the above
B) H2O
199) In the following reaction: HCO3- (aq) + H2O (aq) → H2CO3 (aq) + OH- (aq) A) HCO3- is an acid and H2CO3 is its conjugate base. B) H2O is an acid and OH- is its conjugate base. C) HCO3- is an acid and OH- is its conjugate base. D) H2O is an acid and H2CO3 is its conjugate base. E) H2O is an acid and HCO3- is its conjugate base.
B) H2O is an acid and OH- is its conjugate base.
133) What is the limiting reactant for the following reaction given we have 2.6 moles of HCl and of Ca(OH)2? Reaction: 2HCl + Ca(OH)2 → 2H2O + CaCl2 A) Ca(OH)2 B) HCl C) H2O D) CaCl2 E) not enough information
B) HCl
181) Which compound below forms an electrolyte solution when dissolved in water? A) Cl2 B) KOH C) CH3CH2OH D) C12H22O11 (sucrose) E) none of the above
B) KOH
132) What is the limiting reactant for the following reaction given we have 3.4 moles of Ca(NO3)2 and 2.4 moles of Li3PO4? Reaction: 3Ca(NO3)2 + 2Li3PO4 → 6LiNO3 + Ca3(PO4)2 A) Ca(NO3)2 B) Li3PO4 C) LiNO3 D) Ca3(PO4)2 E) not enough information
B) Li3PO4
134) What is the limiting reactant for the reaction below given that you start with 2.50 grams C and 2.50 grams SiO2? Reaction: C + SiO2 → SiC + O2 A) C B) SiO2 C) SiC D) O2 E) There is no limiting reactant.
B) SiO2
186) A solution is saturated in both nitrogen gas (N2) and sodium iodide (NaI) at 50°C. When the solution is cooled to 25°C, which of the following is most likely to occur? A) Some nitrogen gas bubbles out of solution. B) Some sodium iodide will precipitate out of solution. C) Both A and B will happen. D) Nothing will happen. E) not enough information
B) Some sodium iodide will precipitate out of solution.
14) A sample of wood with a mass of 3.0 grams was burned in an open dish. The ashes weighed 1.2 grams. What happened to the rest of the wood? A) The remaining mass was destroyed. B) The remaining 1.8 grams was converted into gaseous compounds. C) Nothing, the burned wood simply has a mass of 1.2 grams. D) The remaining 1.8 grams was converted into heat. E) none of the above
B) The remaining 1.8 grams was converted into gaseous compounds.
205) In order for a solution to be acidic: A) [H3O+] < [OH-] B) [H3O+] > [OH-] C) [H3O+] = [OH-] D) pH = pOH E) none of the above
B) [H3O+] > [OH-]
11) What is the definition of a scientific theory? A) a brief statement that summarizes past observations and predicts future ones B) a model that explains the underlying reasons for observations and laws C) the equivalent of a scientific opinion which others may disagree with D) a method of learning that emphasizes reason as the way to understand the world E) none of the above
B) a model that explains the underlying reasons for observations and laws
185) Solubility of gases in water: A) is independent of pressure above solution. B) increases with increasing pressure above solution. C) decreases with increasing pressure above solution. D) Gases are not soluble in water. E) none of the above
B) increases with increasing pressure above solution.
61) When elements combine to form compounds: A) their properties are an average of all elements in the compound. B) their properties change completely. C) their properties do not change. D) their properties are completely random. E) none of the above
B) their properties change completely.
162) Which one of the following types of electromagnetic radiation has a higher energy per photon than visible radiation? A) microwave B) ultraviolet C) radio D) infrared E) none of the above
B) ultraviolet
145) Starting with 156 g O and 33.3 g O, decide which reactant is present in limiting quantities. Given: O + O → 2 LiOH A) lithium oxide B) water C) lithium hydroxide D) insufficient data E) none of the above
B) water
207) The titration of 25.00 mL a 0.125 M HCl solution required 21.37 mL of KOH to reach the endpoint. What is the concentration of the KOH? A) 0.292 M B) 0.0668 M C) 0.146 M D) 0.134 M E) none of the above
C) 0.146 M
206) Which of the following statements are TRUE of buffer solutions? 1. A buffer solution can be made by mixing equal concentrations of acetic acid and sodium acetate. 2. A buffer solution can be made by mixing equal concentrations of hydrochloric acid and sodium chloride. 3. A buffer solution resists changes in pH when small quantities of acid or base are added. A) 1 and 2 only B) 2 and 3 only C) 1 and 3 only D) All of 1, 2, and 3 E) None of 1, 2, and 3
C) 1 and 3 only
126) How many moles of water are made from complete reaction of 1.4 moles of hydrogen gas? Given the reaction: 2H2 + O2 → 2H2O A) 2.8 B) 0.7 C) 1.4 D) 2.1 E) not enough information
C) 1.4
81) What is the formula mass of magnesium nitride? A) 38.32 B) 90.65 C) 100.95 D) 116.33 E) none of the above
C) 100.95
47) The temperature of 390 kelvin is warmer than which one of the following temperatures? A) 250 deg F B) 135 deg C C) 109 deg C D) 244 deg F E) none of the above
C) 109 deg C
187) A solution contains 100.0 g water, 10.0 g NaCl, and 15.0 g methanol. What is the mass percent of methanol in the solution? A) 8.00% B) 10.0% C) 12.0% D) 15.0% E) none of the above
C) 12.0%
154) What is the electron configuration for Kr? A) 1s22s22p63s23p43d104s24p6 B) 1s22s22p63s23p64s23d24p6 C) 1s22s22p63s23p64s23d104p6 D) 1s22s22p63s23p24s23d104p6 E) none of the above
C) 1s22s22p63s23p64s23d104p6
31) How many significant figures should be reported in the answer to the following calculation? A) 3 B) 4 C) 2 D) 5 E) none of the above
C) 2
56) What is the charge on a calcium atom that contains 18 ? A) 1+ B) 20+ C) 2+ D) 2- E) none of the above
C) 2+
28) When rounding the number 2.348615 to 4 significant figures, what is the correct value? A) 2.3490 B) 2.340 C) 2.349 D) 2.348 E) none of the above
C) 2.349
129) A chemist wishes to perform the following reaction: N2 + 3 H2 → 2 NH3 If only 14.0 g of N2 is available, what is the minimum amount, in grams, of H2 needed to completely react with this quantity of N2? A) 1.01 g B) 1.51 g C) 3.03 g D) 6.06 g E) none of the above
C) 3.03 g
90) What is the mass (in grams) of 1.95 moles of water ? A) 18.02 B) 9.24 C) 35.1 D) 6.022 × 1023 E) none of the above
C) 35.1
94) What is the mass percent of Na in sodium chloride? A) 58.4 B) 60.7 C) 39.3 D) 47.5 E) none of the above
C) 39.3
26) How many significant figures are in the number 2903? A) 2 B) 5 C) 4 D) 3 E) none of the above
C) 4
102) How many molecules of nitrogen monoxide are in a 22.5 gram sample? A) 5.86 × 1023 B) 7.33 × 1023 C) 4.51 × 10^23 D) 4.06 × 1023 E) none of the above
C) 4.51 × 1023
46) What is the value of 783 K in units of °C? A) 417 B) 1441 C) 510. D) 1056 E) none of the above
C) 510.
58) How many protons are found in C-14? A) 8 B) 14 C) 6 D) 0 E) none of the above
C) 6
104) A 15.5 gram sample of diphosphorous pentoxide contains how many grams of phosphorous? A) 3.38 B) 1.69 C) 6.76 D) 13.5 E) none of the above
C) 6.76
135) If 16.0 grams of aluminum oxide were actually produced, what is the percent yield of the reaction below given that you start with 10.0 g of Al and 19.0 grams of O2? Reaction: 4Al + 3O2 → 2Al2O3 A) 75.0% B) 100% C) 84.7% D) 39.6% E) not enough information
C) 84.7%
118) Which of the following statements about redox reactions is FALSE? A) Oxidation is the loss of electrons. B) Reduction is the gain of electrons. C) A reaction can result in either oxidation or reduction, not both. D) A reaction involving elemental oxygen is a redox reaction. E) All of the above statement are true.
C) A reaction can result in either oxidation or reduction, not both.
69) What is the formula for the acetate polyatomic ion? A) C3H2O3- B) C2H3O22- C) C2H3O2- D) C2H3O- E) none of the above
C) C2H3O2-
64) How many of each type of atom are there in the formula Ca3(PO4)2? A) Ca = 3, P = 1, O = 4 B) Ca = 3, P = 2, O = 4 C) Ca = 3, P = 2, O = 8 D) Ca = 3, P = 1, O = 8 E) none of the above
C) Ca = 3, P = 2, O = 8
17) Which of the following is considered a hypothesis (as opposed to an observation)? A) Spiders have eight legs. B) Birds can fly because they have hollow bones. C) Fresh lava from a volcano is hot. D) The Washington Monument is 555 feet tall. E) none of the above
C) Fresh lava from a volcano is hot.
179) Which molecule listed below has a nonpolar covalent bond? A) NaCl B) H2O C) H2 D) all of the compounds E) none of the compounds
C) H2
201) A neutralization reaction between KOH (aq) and H2SO4 (aq) would give which two products? A) H2O (l) and H2S (g) B) H2O (l) and KSO4 (aq) C) H2O (l) and K2SO4 (aq) D) SO2 (g) and KH2 (g) E) none of the above
C) H2O (l) and K2SO4 (aq)
171) The Lewis structure, [: - = ] best represents: A) NO2+ B) NO2- C) NO2 D) both NO2+ and NO2- E) answers A, B, and C
C) NO2
149) Which of the following statements about the quantum-mechanical model is FALSE? A) Orbitals are a probability map of finding electrons. B) Electrons do not behave as particles. C) Orbitals are specific paths electrons follow. D) Electron paths cannot be described exactly. E) All of the above are correct statements.
C) Orbitals are specific paths electrons follow.
110) Considering the following precipitation reaction: Pb(NO3)2(aq) + 2KI(aq) → PbI2(s) + 2KNO3(aq) What is the correct net ionic equation? A) Pb2+ + I2- → PbI2(s) B) 2NO3- + 2K+ → 2KNO3 C) Pb2+ + 2NO3- + 2K+ + 2I- → PbI2(s) + 2K+ + 2NO3- D) Pb2+ + 2I- → PbI2(s) E) none of the above
C) Pb2+ + 2NO3- + 2K+ + 2I- → PbI2(s) + 2K+ + 2NO3-
4) Which statement about the scientific method is TRUE? A) The scientific method emphasizes reason as the way to understand the world. B) The scientific method emphasizes observation and reason as the way to understand the world. C) The scientific method emphasizes observation and experimentation as the way to understand the world. D) The scientific method emphasizes scientific laws as the way to understand the world. E) All of the above statements are false.
C) The scientific method emphasizes observation and experimentation as the way to understand the world.
13) Which of the following is an example of an observation? A) All matter is composed of small, indestructible particles called atoms. B) Reactions occur due to the transfer of electrons. C) When a can of soda pop is opened, a fizzing sound is heard. D) Flammable objects contain phlogiston. E) none of the above
C) When a can of soda pop is opened, a fizzing sound is heard.
200) A substance that acts as an acid OR a base is called: A) isoprotic. B) a salt. C) amphoteric. D) hydrophillic. E) none of the above
C) amphoteric.
35) The multiplier 0.01 is represented by which prefix? A) kilo- B) deci- C) centi- D) milli- E) none of the above
C) centi-
71) What is the proper name for HBr (aq)? A) hydrobromous acid B) hydrousbromic acid C) hydrobromic acid D) bromous acid E) none of the above
C) hydrobromic acid
65) Carbon monoxide is considered which of the following? A) atomic element B) molecular element C) molecular compound D) ionic compound E) none of the above
C) molecular compound
130) A tricycle factory uses the following items to produce one tricycle: 3 tires, 1 frame, and 2 pedals. If the factory has available 270 tires, 90 frames, and 170 pedals, which item would limit the amount of complete tricycles that can be assembled? A) tires B) frames C) pedals D) both tires and frames are limiting E) not enough information
C) pedals
8) What term best describes a brief statement that summarizes many past observations and predicts new ones? A) experiment B) hypothesis C) scientific law D) theory E) none of the above
C) scientific law
121) What type of reaction is the generic equation A + BC → AC + B? A) synthesis combination B) decomposition C) single displacement D) double-displacement E) none of the above
C) single displacement
70) What is the name of the molecular compound SO3? A) sulfur oxide B) sulfur(IV) oxide C) sulfur trioxide D) sulfur tetraoxide E) none of the above
C) sulfur trioxide
176) What is the molecular geometry if you have 4 single bonds around the central atom? A) bent B) linear C) tetrahedral D) trigonal pyramidal E) not enough information
C) tetrahedral
177) What is the molecular geometry of SiH4? A) bent B) linear C) tetrahedral D) trigonal pyramidal E) not enough information
C) tetrahedral
178) What is the molecular geometry of NH4+? A) bent B) linear C) tetrahedral D) trigonal pyramidal E) not enough information
C) tetrahedral
202) A 35.0 mL sample of 0.225 M HBr was titrated with 42.3 mL of KOH. What is the concentration of the KOH? A) 0.157 M B) 0.303 M C) 0.272 M D) 0.186 M E) none of the above
D) 0.186 M
189) What is the molarity of a solution prepared by dissolving NaI in ? A) 42.8 B) 0.0714 C) 2.86 D) 0.286 E) none of the above
D) 0.286
75) What is the mass ratio of Na to S in sodium sulfide? A) 7.17 B) 55.06 C) 0.717 D) 1.43 E) none of the above
D) 1.43
99) How many moles are there in 82.5 grams of iron? A) 4.97 × 1025 B) 55.85 C) 0.677 D) 1.48 E) none of the above
D) 1.48
98) How many atoms are in 1.50 moles of fluorine gas? A) 6.022 × 1023 B) 9.03 × 1023 C) 18.98 D) 1.81 × 1024 E) none of the above
D) 1.81 × 10^24
25) How would the number 1.09 x 10^ 1 be expressed in decimal form? A) 109 B) 0.109 C) 1.09 D) 10.9 E) none of the above
D) 10.9
128) How many grams of sodium metal are needed to make 29.3 grams of sodium chloride? Given the reaction: 2Na + Cl2 → 2NaCl A) 46.0 B) 5.75 C) 23.0 D) 11.5 E) not enough information Answer: D
D) 11.5
127) Suppose two chemical reactions are linked together in a way that the O2 produced in the first reaction goes on to react completely with Mg to form MgO in the second reaction. Reaction one: 2 KClO3 → 3 O2 + 2 KCl Reaction two: 2 Mg + O2 → 2 MgO If you start with 4 moles of KClO3, how many moles of MgO could eventually form? A) 2 moles B) 4 moles C) 6 moles D) 12 moles E) none of the above
D) 12 moles
92) How many moles of oxygen are in 3.30 moles of NaC ? A) 3.30 B) 0.303 C) 19.0 D) 13.2 E) none of the above
D) 13.2
63) How many total atoms are in the formula Al2(CO3)3? A) 8 B) 9 C) 12 D) 14 E) none of the above
D) 14
52) How many grams of water when supplied with 454 of heat will gain a temperature of 5.2°C? A) 15 B) 17 C) 19 D) 16 E) none of the above
D) 16
62) What is the oxygen-to-hydrogen mass ratio for H2O2? A) 0.125 B) 4 C) 8 D) 16 E) none of the above
D) 16
153) How many electrons are unpaired in the orbitals of carbon? A) 12 B) 6 C) 4 D) 2 E) none of the above
D) 2
140) How many moles of water are needed to react with 2.2 moles of O? Given: O + O → 2 LiOH A) 4.4 B) 1.1 C) 1.5 D) 2.2 E) none of the above
D) 2.2
43) How many joules are in 55.2 calories? A) 13,200 B) 55,200 C) 13.2 D) 231 E) none of the above
D) 231
50) How much heat (kJ) is absorbed by 948.0 g of water in order for the temperature to increase from to A) 7.5 B) 31.4 C) 30.2 D) 29.7 E) none of the above
D) 29.7
107) Sodium metal reacts with water to form aqueous sodium hydroxide and hydrogen gas. Which equation below best describes the balanced equation for this reaction? A) Na + H2O → NaOH (aq) + H (g) B) S + H2O → SOH (aq) + H (g) C) Na + H2O → NaOH (aq) + H2 (g) D) 2Na + 2H2O → 2NaOH (aq) + H2 (g) E) 2Na + H2O → Na2OH (aq) + H (g)
D) 2Na + 2H2O → 2NaOH (aq) + H2 (g)
27) How many significant figures are represented by the following number that is written in scientific notation? 2.5 × 10 ^3 A) 0 B) 1 C) 2 D) 3 E) none of the above
D) 3
29) How many significant figures should be reported in the answer to the following calculation? (1.40) × (17.1) = A) 0 B) 1 C) 2 D) 3 E) none of the above
D) 3
190) How many moles of KOH are contained in 750. mL of 5.00 M KOH solution? A) 6.67 mol B) 3.75 × mol C) 56.1 mol D) 3.75 mol E) none of the above
D) 3.75 mol
169) The total number of electrons to be counted for the Lewis structure of the PO43- polyatomic ion is: A) 8. B) 26. C) 29. D) 32. E) none of the above
D) 32.
139) Suppose a computer manufacturer can build circuit boards according to the following process: 12 resistors + 20 insulators + 8 memory chips → 4 circuit boards. How many circuit boards could you make using 30 insulators, assuming you have enough of all the other parts? A) 20 B) 4 C) 10 D) 6 E) none of the above
D) 6
142) If the theoretical yield of the reaction below corresponds to and the actual yield was 60.9 g, calculate the percent yield. Given: O + O → 2 LiOH A) 16.0 % B) 71.8 % C) 38.0 % D) 61.4 % E) none of the above
D) 61.4 %
137) What is the theoretical yield in grams of CuS for the following reaction given that you start with of Na2S and CuSO4? Reaction: Na2S + CuSO4 → Na2SO4 + CuS A) 0.0758 B) 0.198 C) 18.93 D) 7.25 E) not enough information
D) 7.25
105) When the equation, ___O2 + ___C5H12 → ___CO2 + ___H2O is balanced, the coefficient: of O2 is: A) 3 B) 4 C) 5 D) 8 E) none of the above
D) 8
203) What is the concentration of H⁺ in 2.0 M acetic acid, HC2H3O2? A) 1.0 M B) 2.0 M C) >2.0 M D) < 2.0 M E) none of the above
D) < 2.0 M
125) Identify the double displacement reactions among the following: 1. KCl(aq) + AgNO3(aq) → AgCl(s) + KNO3(aq) 2. Na2SO4(aq) + BaCl2(aq) → BaSO4(s) + 2NaCl(aq) 3. H2SO4((aq) + 2NaOH(aq) → Na2SO4((aq) + 2H2O(l) A) 1 and 2 only B) 1 and 3 only C) 2 and 3 only D) All of 1, 2, and 3 E) None of 1, 2, and 3
D) All of 1, 2, and 3
103) One mole of ammonium nitrite contains: A) 2 moles of nitrogen atoms. B) 4 moles of hydrogen atoms. C) 2 moles of oxygen atoms. D) All of A, B, and C. E) None of A, B, and C.
D) All of A, B, and C
151) Which statement is NOT true about "p" orbitals? A) A subshell contains three "p" orbitals. B) These orbitals are shaped like dumbbells. C) A 3p orbital has a higher energy than a 2p orbital. D) All three of these statements are true. E) none of the above
D) All three of these statements are true.
155) The element with a completely filled p-subshell is: A) Na. B) Al. C) P. D) Ar. E) none of the above
D) Ar.
164) Which of the atoms represented below is the largest in size? A) N B) As C) Sb D) Bi E) P
D) Bi
148) Which form of electromagnetic radiation has the highest frequency? A) Radio Waves B) Microwaves C) X-rays D) Gamma Rays E) Infrared Radiation
D) Gamma Rays
113) Which of the following would NOT be a product from mixing hydrochloric acid with a solution of sodium sulfite? A) H2O (l) B) SO2 (g) C) NaCl (aq) D) H2 (g) E) none of the above
D) H2 (g)
111) Which of the following is NOT an acid? A) HClO4 B) HNO3 C) HC2H3O2 D) H2SO4 E) none of the above
D) H2SO4
183) Which of the following compounds is a strong electrolyte? A) HCl B) NaCl C) N Cl D) NaC2H3O2 E) all of the above
D) NaC2H3O2
19) Which statement would NOT be an example of "quantification"? A) The newest model of that car gets five more miles per gallon than last year's model. B) The price of milk went up ten cents per gallon. C) The average high temperature this July was two degrees higher than last year's average high temperature. D) The water in the swimming pool feels colder than it was yesterday. E) none of the above
D) The water in the swimming pool feels colder than it was yesterday.
131) Given the balanced equation CO2 + Si → SiO2 + C, if you were to react 1 mole of CO2 with 1 mole of Si, which statement is TRUE? A) The CO2 is the limiting reactant. B) The Si is the limiting reactant. C) The SiO2 is the limiting reactant. D) You have equal stoichiometric amounts of reactants. E) none of the above
D) You have equal stoichiometric amounts of reactants.
7) The definition of a scientific law is: A) the same as a hypothesis. B) a way of learning that emphasizes observation and experimentation. C) the underlying reason for a scientific theory. D) a number of similar observations generalized into a brief statement summarizing past observations and predicting new ones. E) none of the above
D) a number of similar observations generalized into a brief statement summarizing past observations and predicting new ones.
119) The reaction CH4 (g) + 2 O2 (g) → CO2 (g) + 2 H2O (g) is: A) a combustion reaction. B) a redox reaction. C) an exothermic reaction. D) all of the above E) none of the above
D) all of the above
108) Which of the following compounds is SOLUBLE? A) aluminum hydroxide B) aluminum sulfide C) aluminum carbonate D) aluminum sulfate E) none of the above
D) aluminum sulfate
161) Which color of visible light has a wavelength in between that of blue and violet light? A) green B) yellow C) red D) indigo E) none of the above
D) indigo
180) Which of the following substances is NOT a solution? A) homogenized milk B) bronze C) sea water D) soda E) All of the above are solutions.
E) All of the above are solutions.
6) Which statement about a hypothesis is TRUE? A) It is a tentative interpretation or explanation. B) It has the potential to be proven wrong. C) It can be tested by experiments. D) It is part of the scientific method. E) All of the above statements are true.
E) All of the above statements are true.
5) Which of the statements below is NOT part of the scientific method? A) observation and measurement B) formation of a hypothesis C) testing of a hypothesis by experimentation D) refinement of a hypothesis as needed E) All of the above steps are part of the scientific method.
E) All of the above steps are part of the scientific method.
158) Which of the following atoms is the largest? A) Li B) Na C) K D) Rb E) Cs
E) Cs
73) Which of the following compounds have the smallest formula mass? A) CO2 B) SO2 C) NO2 D) SiO2 E) H2O
E) H2O
156) What do the alkali metals all have in common? A) They all undergo similar reactions. B) They all have similar physical properties. C) They all form +1 ions. D) They all have the same number of valence electrons. E) all of the above
E) all of the above
18) The key to success in chemistry is: A) curiosity. B) mathematical skills. C) commitment. D) practice. E) all of the above
E) all of the above
124) What must be supplied for a decomposition reaction to happen? A) energy B) heat C) electrical current D) light E) any of the above
E) any of the above
136) Calculate the maximum number of grams of NH3 that can be produced by the reaction of of N2 with 3.00 g H2. Reaction: N2(g) + 3 H2(g) → 2 NH3(g) A) 0.964 B) 2.43 C) 4.00 D) 17.0 E) none of the above
E) none of the above
170) What is the correct Lewis structure for CO2? A) : - - : B) : = = : C) : = C= : D) : = C= : E) none of the above
E) none of the above
Which of the following statements about soda pop is FALSE? A) Soda pop is a chemical mixture of mostly sugar, water and carbon dioxide. B) The molecules important to fizzing are carbon dioxide and water. C) The carbon dioxide is forced to mix with the water by the presence of sugars. D) When a can is opened, the pressure release allows carbon dioxide to form bubbles. E) All of the above statements are true.
The carbon dioxide is forced to mix with the water by the presence of sugars.
3) A good definition of chemistry is: A) the science that seeks to understand what matter does by studying what atoms and molecules do. B) the science that seeks to understand what living organisms do by studying the molecules that make up the organism. C) the science that seeks to understand what the universe does by studying interactions of molecules with atoms. D) the science that seeks to understand the interactions of molecules for the sake of advancing human control over nature. E) none of the above
the science that seeks to understand what matter does by studying what atoms and molecules do.