Question 1

Balance the chemical equation given below,and determine the number of moles of iodine that react with 40.0 g of aluminum. _____ Al(s)+ _____ I2(s)→ _____ Al2I6(s)

Accepted Answer

A)  0.988 mol 
B)  2.22 mol 
C)  2.97 mol 
D)  4.45 mol

Question 2

How many moles of Co2+ are present in 0.500 L of a 0.450 M solution of CoI2?

Accepted Answer

A)  0.950 moles 
B)  0.500 moles 
C)  1.10 moles 
D)  0.525 moles 
E)  0.225 moles

Question 3

When dissolved in water,KOH behaves as

Accepted Answer

A)  an acid that forms K+ and OH- ions. 
B)  an acid that forms KO- and H+ ions. 
C)  a base that forms K+ and OH- ions. 
D)  a base that forms KO- and H+ ions.

Question 4

According to the following reaction,how many moles of Fe(OH)2 can form from 175.0 mL of 0.227 M LiOH solution? Assume that there is excess FeCl2. FeCl2(aq)+ 2 LiOH(aq)→ Fe(OH)2(s)+ 2 LiCl(aq)

Accepted Answer

A)  3.97 × 10-2 moles 
B)  2.52 × 10-2 moles 
C)  1.99 × 10-2 moles 
D)  5.03 × 10-2 moles 
E)  6.49 × 10-2 moles

Question 5

According to the following reaction,how many grams of sulfur are formed when 37.4 g of water are formed? 2 H2S(g)+ SO2(g)→ 3 S(s)+ 2 H2O(l)

Accepted Answer

A)  99.8 g S 
B)  66.6 g S 
C)  56.1 g S 
D)  44.4 g S 
E)  14.0 g S

Question 6

When 220.mL of 1.50 × 10-4 M hydrochloric acid is added to 135 mL of 1.75 × 10-4 M Mg(OH)2,the resulting solution will be

Accepted Answer

A)  acidic. 
B)  basic 
C)  neutral. 
D)  It is impossible to tell from the information given.

Question 7

Define a greenhouse gas.

Accepted Answer

A)  Greenhouse gases prevent visible light from passing through and warming the Earth's surface, and prevent heat energy from radiating back out into space. 
B)  Greenhouse gases allow visible light to pass through and warm the Earth's surface, and also allow heat energy to radiate back out into space. 
C)  Greenhouse gases allow visible light to pass through and cool the Earth's surface, and prevent heat energy from radiating back out into space. 
D)  Greenhouse gases allow visible light to pass through and warm the Earth's surface, and prevent heat energy from radiating back out into space. 
E)  Greenhouse gases prevent visible light from passing through and cooling the Earth's surface, and prevent heat energy from radiating back out into space.

Question 8

According to the following reaction,what mass of PbCl2 can form from 235 mL of 0.110 M KCl solution? Assume that there is excess Pb(NO3)2. 2 KCl(aq)+ Pb(NO3)2(aq)→ PbCl2(s)+ 2 KNO3(aq)

Accepted Answer

A)  7.19 g 
B)  3.59 g 
C)  1.80 g 
D)  5.94 g 
E)  1.30 g

Question 9

Which of the following compounds is soluble in water?

Accepted Answer

A)  SrS 
B)  SrCO3 
C)  PbBr2 
D)  SrSO4 
E)  None of these compounds is soluble in water.

Question 10

What reagent could be used to separate Br- from CH3CO2- when added to an aqueous solution containing both?

Accepted Answer

A)  AgNO3(aq) 
B)  Ca(OH)2(aq) 
C)  CuSO4(aq) 
D)  NaBr(aq)

Question 11

According to the following reaction,what volume of 0.244 M KCl solution is required to react exactly with 50.0 mL of 0.210 M Pb(NO3)2 solution? 2 KCl(aq)+ Pb(NO3)2(aq)→ PbCl2(s)+ 2 KNO3(aq)

Accepted Answer

A)  97.4 mL 
B)  116 mL 
C)  43.0 mL 
D)  86.1 mL 
E)  58.1 mL

Question 12

How many ions are present in 30.0 mL of 0.600 M H2CO3 solution?

Accepted Answer

A)  3.25 × 1022 ions 
B)  2.17 × 1022 ions 
C)  1.08 × 1022 ions 
D)  5.42 × 1022 ions 
E)  3.61 × 1021 ions

Question 13

What mass (in g)of AgCl is formed from the reaction of 75.0 mL of a 0.078 M AgC2H3O2 solution with 55.0 mL of 0.109 M MgCl2 solution? 2 AgC2H3O2(aq)+ MgCl2(aq)→ 2 AgCl(s)+ Mg(C2H3O2)2(aq)

Accepted Answer

A)  0.838 g 
B)  1.72 g 
C)  0.859 g 
D)  2.56 g 
E)  1.70 g

Question 14

Dinitrogen monoxide gas decomposes to form nitrogen gas and oxygen gas.How many grams of oxygen are formed when 10.0 g of dinitrogen monoxide decomposes?

Accepted Answer

A)  0.275 g 
B)  3.64 g 
C)  7.27 g 
D)  14.5 g

Question 15

Give the spectator ions for the reaction that occurs when aqueous solutions of K2S and Fe(NO3)2 are mixed.

Accepted Answer

A)  K+ and NO3- 
B)  Fe2+ and K+ 
C)  S2- and NO3- 
D)  Fe2+ and  S2- 
E)  No spectator ions are present.

Question 16

Identify the spectator ions for the reaction that occurs when aqueous solutions of lithium sulfide and copper(II)nitrate are mixed.

Accepted Answer

A)  Cu2+ and NO3- 
B)  Li+ and Cu2+ 
C)  Li+ and NO3- 
D)  S2- and Cu2+ 
E)  No spectator ions are present.

Question 17

A solution is prepared by adding 1.70 g of solid NaCl to 50.0 mL of 0.100 M CaCl2.What is the molarity of chloride ion in the final solution? Assume that the volume of the final solution is 50.0 mL.

Accepted Answer

A)  0.782 
B)  0.682 
C)  0.134 
D)  0.234 
E)  0.582

Question 18

Identify the oxidation state of H in HCl(aq). Ca(s)+ 2 HCl(aq)→ CaCl2(aq)+ H2(g)

Accepted Answer

A)  +1 
B)  +2 
C)  0 
D)  -1 
E)  -2

Question 19

Which of the following pairs of aqueous solutions will form a precipitate when mixed?

Accepted Answer

A)  Li2CO3 + NaI 
B)  Li2 SO4 + KOH 
C)  CaS + Na2SO4 
D)  None of these solution pairs will produce a precipitate. 
E)  All of these solution pairs will produce a precipitate.

Exam 4: Chemical Quantities and Aqueous Reactions

Balance the chemical equation given below,and determine the number of moles of iodine that react with 40.0 g of aluminum. ___ Al(s) + _ I₂(s) → ___ Al₂I₆(s)

How many moles of Co²⁺ are present in 0.500 L of a 0.450 M solution of CoI₂?

When dissolved in water,KOH behaves as

According to the following reaction,how many moles of Fe(OH) ₂ can form from 175.0 mL of 0.227 M LiOH solution? Assume that there is excess FeCl₂. FeCl₂(aq) + 2 LiOH(aq) → Fe(OH) ₂(s) + 2 LiCl(aq)

According to the following reaction,how many grams of sulfur are formed when 37.4 g of water are formed? 2 H₂S(g) + SO₂(g) → 3 S(s) + 2 H₂O(l)

When 220.mL of 1.50 × 10^-4M hydrochloric acid is added to 135 mL of 1.75 × 10^-4 M Mg(OH) ₂,the resulting solution will be

Define a greenhouse gas.

According to the following reaction,what mass of PbCl₂ can form from 235 mL of 0.110 M KCl solution? Assume that there is excess Pb(NO₃) ₂. 2 KCl(aq) + Pb(NO₃) ₂(aq) → PbCl₂(s) + 2 KNO₃(aq)

Which of the following compounds is soluble in water?

What reagent could be used to separate Br^- from CH₃CO₂^-when added to an aqueous solution containing both?

According to the following reaction,what volume of 0.244 M KCl solution is required to react exactly with 50.0 mL of 0.210 M Pb(NO₃) ₂ solution? 2 KCl(aq) + Pb(NO₃) ₂(aq) → PbCl₂(s) + 2 KNO₃(aq)

How many ions are present in 30.0 mL of 0.600 M H₂CO₃ solution?

What mass (in g) of AgCl is formed from the reaction of 75.0 mL of a 0.078 M AgC₂H₃O₂ solution with 55.0 mL of 0.109 M MgCl₂ solution? 2 AgC₂H₃O₂(aq) + MgCl₂(aq) → 2 AgCl(s) + Mg(C₂H₃O₂) ₂(aq)

Dinitrogen monoxide gas decomposes to form nitrogen gas and oxygen gas.How many grams of oxygen are formed when 10.0 g of dinitrogen monoxide decomposes?

Give the spectator ions for the reaction that occurs when aqueous solutions of K₂S and Fe(NO₃) ₂ are mixed.

Identify the spectator ions for the reaction that occurs when aqueous solutions of lithium sulfide and copper(II) nitrate are mixed.

A solution is prepared by adding 1.70 g of solid NaCl to 50.0 mL of 0.100 M CaCl₂.What is the molarity of chloride ion in the final solution? Assume that the volume of the final solution is 50.0 mL.

Identify the oxidation state of H in HCl(aq) . Ca(s) + 2 HCl(aq) → CaCl₂(aq) + H₂(g)

Which of the following pairs of aqueous solutions will form a precipitate when mixed?

Exam 4: Chemical Quantities and Aqueous Reactions

Balance the chemical equation given below,and determine the number of moles of iodine that react with 40.0 g of aluminum. _____ Al(s) + _____ I2(s) → _____ Al2I6(s)

How many moles of Co2+ are present in 0.500 L of a 0.450 M solution of CoI2?

When dissolved in water,KOH behaves as

According to the following reaction,how many moles of Fe(OH) 2 can form from 175.0 mL of 0.227 M LiOH solution? Assume that there is excess FeCl2. FeCl2(aq) + 2 LiOH(aq) → Fe(OH) 2(s) + 2 LiCl(aq)

According to the following reaction,how many grams of sulfur are formed when 37.4 g of water are formed? 2 H2S(g) + SO2(g) → 3 S(s) + 2 H2O(l)

When 220.mL of 1.50 × 10-4 M hydrochloric acid is added to 135 mL of 1.75 × 10-4 M Mg(OH) 2,the resulting solution will be

Define a greenhouse gas.

According to the following reaction,what mass of PbCl2 can form from 235 mL of 0.110 M KCl solution? Assume that there is excess Pb(NO3) 2. 2 KCl(aq) + Pb(NO3) 2(aq) → PbCl2(s) + 2 KNO3(aq)

Which of the following compounds is soluble in water?

What reagent could be used to separate Br- from CH3CO2- when added to an aqueous solution containing both?

According to the following reaction,what volume of 0.244 M KCl solution is required to react exactly with 50.0 mL of 0.210 M Pb(NO3) 2 solution? 2 KCl(aq) + Pb(NO3) 2(aq) → PbCl2(s) + 2 KNO3(aq)

How many ions are present in 30.0 mL of 0.600 M H2CO3 solution?

What mass (in g) of AgCl is formed from the reaction of 75.0 mL of a 0.078 M AgC2H3O2 solution with 55.0 mL of 0.109 M MgCl2 solution? 2 AgC2H3O2(aq) + MgCl2(aq) → 2 AgCl(s) + Mg(C2H3O2) 2(aq)

Dinitrogen monoxide gas decomposes to form nitrogen gas and oxygen gas.How many grams of oxygen are formed when 10.0 g of dinitrogen monoxide decomposes?

Give the spectator ions for the reaction that occurs when aqueous solutions of K2S and Fe(NO3) 2 are mixed.

Identify the spectator ions for the reaction that occurs when aqueous solutions of lithium sulfide and copper(II) nitrate are mixed.

A solution is prepared by adding 1.70 g of solid NaCl to 50.0 mL of 0.100 M CaCl2.What is the molarity of chloride ion in the final solution? Assume that the volume of the final solution is 50.0 mL.

Identify the oxidation state of H in HCl(aq) . Ca(s) + 2 HCl(aq) → CaCl2(aq) + H2(g)

Which of the following pairs of aqueous solutions will form a precipitate when mixed?

Balance the chemical equation given below,and determine the number of moles of iodine that react with 40.0 g of aluminum. ___ Al(s) + _ I₂(s) → ___ Al₂I₆(s)

How many moles of Co²⁺ are present in 0.500 L of a 0.450 M solution of CoI₂?

According to the following reaction,how many moles of Fe(OH) ₂ can form from 175.0 mL of 0.227 M LiOH solution? Assume that there is excess FeCl₂. FeCl₂(aq) + 2 LiOH(aq) → Fe(OH) ₂(s) + 2 LiCl(aq)

According to the following reaction,how many grams of sulfur are formed when 37.4 g of water are formed? 2 H₂S(g) + SO₂(g) → 3 S(s) + 2 H₂O(l)

When 220.mL of 1.50 × 10^-4M hydrochloric acid is added to 135 mL of 1.75 × 10^-4 M Mg(OH) ₂,the resulting solution will be

According to the following reaction,what mass of PbCl₂ can form from 235 mL of 0.110 M KCl solution? Assume that there is excess Pb(NO₃) ₂. 2 KCl(aq) + Pb(NO₃) ₂(aq) → PbCl₂(s) + 2 KNO₃(aq)

What reagent could be used to separate Br^- from CH₃CO₂^-when added to an aqueous solution containing both?

According to the following reaction,what volume of 0.244 M KCl solution is required to react exactly with 50.0 mL of 0.210 M Pb(NO₃) ₂ solution? 2 KCl(aq) + Pb(NO₃) ₂(aq) → PbCl₂(s) + 2 KNO₃(aq)

How many ions are present in 30.0 mL of 0.600 M H₂CO₃ solution?

What mass (in g) of AgCl is formed from the reaction of 75.0 mL of a 0.078 M AgC₂H₃O₂ solution with 55.0 mL of 0.109 M MgCl₂ solution? 2 AgC₂H₃O₂(aq) + MgCl₂(aq) → 2 AgCl(s) + Mg(C₂H₃O₂) ₂(aq)

Give the spectator ions for the reaction that occurs when aqueous solutions of K₂S and Fe(NO₃) ₂ are mixed.

A solution is prepared by adding 1.70 g of solid NaCl to 50.0 mL of 0.100 M CaCl₂.What is the molarity of chloride ion in the final solution? Assume that the volume of the final solution is 50.0 mL.

Identify the oxidation state of H in HCl(aq) . Ca(s) + 2 HCl(aq) → CaCl₂(aq) + H₂(g)