Test quiz 3

35) A balloon originally had a volume of 0.439 L at 44°C and a pressure of 729 torr. To what temperature must the balloon be cooled to reduce its volume to 378 mL if the pressure remained constant? A) 0°C B) 38°C C) 95°C D) 273°C E) none of the above

A) 0°C

31) Divers often inflate heavy duty balloons attached to salvage items on the sea floor. If a balloon is filled to a volume of 3.00 L at a pressure of 2.50 atm, what is the volume of the balloon when it reaches the surface? A) 7.50 L B) 1.20 L C) 0.833 L D) 5.50 L E) none of the above

A) 7.50 L

41) How many moles of gas were added to a balloon that started with 2.3 moles of gas and a volume of 1.4 L given that the final volume was 7.2 L? A) 9.5 B) 4.4 C) 12 D) 0.085 E) none of the above

A) 9.5

17) 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 ClE) none of the above

A) H+ + Cl- + K+ + OH- → H2O + K+ + Cl

7) Which of the following compounds is INSOLUBLE? A) magnesium phosphate B) magnesium sulfate C) magnesium iodide D) magnesium nitrate E) none of the above 9) Which of the following

A) Magnesium phosphate

15) What type of a reaction occurs when a silver nitrate solution is mixed with sodium chloride solution? A) precipitation B) acid-base neutralization C) oxidation-reduction D) gas evolution E) no reaction

A) precipitation

23) What type of reaction is the generic equation A + B → AB? A) synthesis/combination B) decomposition C) displacement D) double-displacement E) none of the above

A) synthesis/combination

13) Considering the following precipitation reaction: Pb(NO3)2(aq) + 2KI(aq) → PbI2(s) + 2KNO3(aq) Which compound would not form ions in the complete ionic equation? A) PbI2 B) KNO3 C) Pb(NO3)2 D) KI E) All compounds form ions in the complete ionic equation.

A)PbI2

38) A sample of helium gas initially at 37.0°C, 785 torr and 2.00 L was heated to 58.0°C while the volume expanded to 3.24 L. What is the final pressure in atm? A) 517 B) 0.681 C) 1.79 D) 3.21 E) none of the above

B) 0.681

5) 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

6) What are the coefficients for the following reaction when it is properly balanced? ___nitrogen monoxide + ___carbon monoxide → ___nitrogen +___carbon dioxide A) 2, 1, 1, 2 B) 2, 2, 1, 2 C) 2, 2, 2, 1 D) 1, 1, 2, 2 E) none of the above

B) 2,2,1,2

47) Hydrogen gas produced in the laboratory by the reaction of zinc and hydrochloric acid was collected over water at 25°C. The barometric pressure at the time was 742.5 mm Hg. What is the pressure of dry hydrogen gas if the vapor pressure of water at 25°C is 23.8 mm Hg? A) 742.5 mm Hg B) 718.7 C) 766.3 D) 760.0 E) none of the above

B) 718.7

48) At STP, 12.69 g of a noble gas occupies 14.09 L. What is the identity of the noble gas? A) He B) Ne C) Ar D) Kr E) not enough information

B) Ne

37) A certain volume of gas was confined in a rigid container. If the pressure of the gas sample in the container was doubled, what happened to the temperature? A) The temperature became one half. B) The temperature doubled. C) The temperature increased four times. D) The temperature decreased one-third. E) not enough information

B) The temperature doubled.

40) What happens to the volume of a gas when you double the number of moles of gas while keeping the temperature and pressure constant? A) The volume is halved. B) The volume doubles. C) The volume decreases, but more information is needed. D) The volume increases, but more information is needed. E) none of the above

B) The volume doubles.

46) What problem could happen if deep sea divers used pure oxygen in their tanks? A) hypoxia B) oxygen toxicity C) nitrogen narcosis D) rapture of oxygen

B) oxygen toxicity

33) Which one of the following is impossible for an ideal gas?

Both A) and D) V1T1 = V2T2 V1/V2=T2/T1

32) The initial volume of a gas cylinder is 750.0 mL, if the pressure of a gas inside the cylinder changes from 840.0 mmHg to 360.0 mmHg, what is the final volume the gas occupies? A) 3.151 L B) 630.0 mL C) 1.750 L D) 321.4 mL E) none of the above

C) 1.750 L

50) What is the molecular weight of a gas if a 15.0 g sample has a pressure of 836 mmHg at 25.0° in a 2.00 L flask? A) 176 B) 1.35 C) 167 D) 11.1 E) none of the above

C) 167

3) What are the coefficients for the following reaction when it is properly balanced? ___Na3PO4 + ___Ba(NO3)2 → ___NaNO3 + ___Ba3(PO4)2 A) 2, 1, 1, 3 B) 2, 3, 1, 6 C) 2, 3, 6, 1 D) 6, 1, 3, 2 E) none of the above

C) 2,3,6,1

29) What is the equivalent pressure of 1520 torr in units of atm? A) 203,000 B) 380. C) 2.00 D) 1520 E) none of the above

C) 2.00

43) A 3.76 g sample of a noble gas is stored in a 2.00 L vessel at 874 torr and 25°C, what is the noble gas? A) He B) Ne C) Ar D) Kr E) not enough information

C) Ar

16) What is the net ionic equation for the reaction of hydrochloric acid with potassium hydroxide? A) H+ + Cl- + K+ + OH- → H2O + K+ + ClB) HCl + KOH → H2O + KCl C) H+ + OH- → H2O D) 2H+ +2Cl- + K2+ + 2OH- → H2O + K2+ +2 ClE) none of the above

C) H+ + OH- → H2O

36) What is the proper form of the combined gas law?

C) P1*V1/ T1 = P2*V2/T2

14) Considering the following precipitation reaction: Pb(NO3)2(aq) + 2KI(aq) → PbI2(s) + 2KNO3(aq) What is the correct complete ionic equation? A) Pb2+ + (NO3)2 - + 2K+ + 2I- → PbI2(s) + 2K+ + 2NO3 - B) Pb2+ + 2NO3 - +2K+ + I- → PbI2(s) + 2K+ + NO3 C) Pb2+ + 2NO3 - + 2K+ + 2I- → PbI2(s) + 2K+ + 2NO3 D) Pb2+ + 2NO3 - + 2K+ + 2I- → Pb2+ + 2I- + 2K+ + 2NO3 E) none of the above

C) Pb2+ + 2NO3 - + 2K+ + 2I- → PbI2(s) + 2K+ + 2NO3 -

39) To solve problems using Avogadro's Law, which mathematical equation should be used?

C) V1/N1=V2/N2

24) What type of reaction is the generic equation A + BC → AC + B ? A) synthesis/combination B) decomposition C) displacement D) double-displacement E) none of the above

C) displacement

20) 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

C) oxidation/reduction

9) Which of the following compounds is SOLUBLE? A) copper carbonate B) calcium carbonate C) potassium carbonate D) strontium carbonate E) none of the above

C) potassium carbonate

22) 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 undergo 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 undergo either oxidation or reduction, not both.

34) If the volume of a gas container at 32.0°C changes from 1.55 L to 755 mL, what will the final temperature be? A) 149°C B) 353°C C) 273°C D) -124°C E) none of the above

D) -124°C

4) What are the coefficients for the following reaction when it is properly balanced? ___nitric acid + ___sodium hydroxide → ___sodium nitrate + ___water A) 2, 1, 1, 1 B) 2, 3, 2, 2 C) 5, 2, 2, 1 D) 1, 1, 1, 1 E) none of the above

D) 1,1,1,1

45) If a mixture of gases contained 78% nitrogen at a pressure of 984 mmHg and 22% carbon dioxide at 345 torr, what is the total pressure of the system? A) 1,329 atm B) 17.5 cm Hg C) 639 torr D) 1.75 atm E) none of the above

D) 1.75 atm

49) How many liters of O2 (g) are needed to react completely with 56.0 L of CH4 (g) at STP to produce CO2 (g) and H2O (g)? Given: CH4 (g) + 2O2 (g) → CO2 (g) + H2O (g) A) 28.0 L B) 56.0 L C) 84.0 L D) 112. L E) none of the above

D) 112. L

2) What are the coefficients for the following reaction when it is properly balanced? ___O2 + ___CH4 → ___CO2 + ___H2O A) 2, 1, 3, 1 B) 2, 3, 2, 2 C) 1, 3, 2, 1 D) 2, 1, 1, 2 E) none of the above

D) 2,1,1,2

21) Identify the combustion/oxidation reactions among the following: 1. Zn(s) + Cu2+(aq) → Zn2+(aq) + Cu(s) 2. 2 Na(s) + Cl2(aq) → 2NaCl(s) 3. 2 Mg(s) + O2(g) → 2 MgO A) 1 and 2 only B) 1 and 3 only C) 3 only D) All of 1, 2, and 3 E) None of 1, 2, and 3

D) All of 1, 2, and 3

25) 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

10) 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

18) When a solution of MgCl2 and one of AgNO3 are mixed, the net ionic equation is A) Mg2+(aq) + 2Cl-(aq) + 2Ag+(aq) + 2NO3 - (aq) → Mg2+(aq) + 2NO3 -aq) + 2AgCl(s) B) Mg2+(aq) + 2Cl-(aq) + 2Ag+(aq) + 2NO3 - (aq) → Mg(NO3)2 (aq) + 2 AgCl(s) C) Mg2+(aq) + 2NO3 -(aq) → Mg(NO3)2(aq) D) Cl-(aq) + Ag+(aq) → AgCl(s) E) none of the above

D) Cl-(aq) + Ag+(aq) → AgCl(s)

44) Which of the following diatomic elements would have a mass of 19.08 grams stored in a 3.82 L container at 3,632 mmHg and 100°C? A) H2 B) Br2 C) F2 D) O2 E) not enough information.

D) O2

26) Which of the following is NOT part of the Kinetic Molecular Theory? A) Gas particles do not repel each other. B) There is a large distance between gas particles as compared to their relative size. C) The size of the actual gas particles is small compared to the volume of the whole gas. D) The average energy of the particles is dependent on the molecular mass of the particle. E) All of the above statements are part of the Kinetic Molecular Theory.

D) The average energy of the particles is dependent on the molecular mass of the particle.

12) A precipitate is expected to be formed when an aqueous solution of sodium sulfate is added to an aqueous soluton of A) iron(III) chloride B) potassium chloride C) magnesium chloride D) barium chloride E) none of the above

D) barium chloride

19) What type of a reaction occurs when hydrochloric acid is mixed with a sodium bicarbonate solution? A) precipitation B) acid-base neutralization C) oxidation-reduction D) gas evolution E) no reaction

D) gas evolution

1) Which of the following is NOT evidence that a chemical reaction has occurred? A) color change B) solid formation C) gas formation D) emission of light E) All of the above are evidence of a chemical reaction.

E) All of the above are evidence of a chemical reaction

42) The ideal gas law is: PV = nRT

E) All of the above are true forms.

27) Which of following statements are consistent with the Kinetic Molecular Theory? A) Gases are compressible because the volume of atoms is almost entirely open space. B) Gases assume the shape and volume of their container because they are in constant, straight-line motion. C) Gases have a low density because there is so much empty space between the particles. D) Gas particles collide with each other and surfaces without losing any energy. E) All of the above statements are consistent with the Kinetic Molecular Theory.

E) All of the above statements are consistent with the Kinetic Molecular Theory.

11) All of the following compounds are soluble in water EXCEPT A) NaCl B) CaCl2 C) FeCl3 D) NH4Cl E) PbCl2

E) PbCL2

28) 1 atm is equal to: A) 760 mm Hg. B) 760 torr. C) 101,325 Pa. D) 14.7 psi. E) all of the above

E) all of the above

30) To solve problems using Boyle's Law, which mathematical equation should be used?

E) both B and C P1V1=P2V2 And P1/V2=P2/V1