Question 1

What is the concentration of HCl in the final solution when 65 mL of a 9.0 M HCl solution is diluted with pure water to a total volume of 0.15 L?

Accepted Answer

A)  2.1 × 10-2 M 
B)  3.9 M 
C)  21 M 
D)  3.9 × 103 M 
A)  2.1 × 10-2 M 
B)  3.9 M 
C)  21 M 
D)  3.9 × 103 M

Question 2

How many moles of CuO can be produced from 0.450 mol of Cu2O in the following reaction? 2 Cu2O(s)+ O2(g)→ 4 CuO(s)

Accepted Answer

A)  0.225 mol 
B)  0.450 mol 
C)  0.900 mol 
D)  1.80 mol 
E)  63.2 mol 
A)  0.225 mol 
B)  0.450 mol 
C)  0.900 mol 
D)  1.80 mol 
E)  63.2 mol

Question 3

Which pair of compounds is soluble in water?

Accepted Answer

A)  Hg2I2 and AgCl 
B)  CoS and K2S 
C)  NaI   and Cu(NO3)2 
D)  LiNO3 and CaCO3 
A)  Hg2I2 and AgCl 
B)  CoS and K2S 
C)  NaI   and Cu(NO3)2 
D)  LiNO3 and CaCO3

Question 4

Determine the concentration of a solution prepared by diluting 25.0 mL of a stock 0.188 M Sr(NO3)2 solution to 150.0 mL.

Accepted Answer

A)  1.13 M 
B)  0.0887 M 
C)  0.0313 M 
D)  0.0199 M 
E)  0.0501 M 
A)  1.13 M 
B)  0.0887 M 
C)  0.0313 M 
D)  0.0199 M 
E)  0.0501 M

Question 5

Which of the following compounds is insoluble in water?

Accepted Answer

A)  Hg2Cl2 
B)  Na2SO4 
C)  (NH4)2CO3 
D)  BaS 
E)  All of these compounds are soluble in water. 
A)  Hg2Cl2 
B)  Na2SO4 
C)  (NH4)2CO3 
D)  BaS 
E)  All of these compounds are soluble in water.

Question 6

Give the percent yield when 28.16 g of CO2 are formed from the reaction of 5.000 moles of C8H18 with 5.000 moles of O2. 2 C8H18 + 25 O2 → 16 CO2 + 18 H2O

Accepted Answer

A)  16.00% 
B)  20.00% 
C)  40.00% 
D)  10.00% 
E)  68.50 
A)  16.00% 
B)  20.00% 
C)  40.00% 
D)  10.00% 
E)  68.50

Question 7

A student dissolved 5.00 g of Co(NO3)2 in enough water to make 100.mL of stock solution.He took 4.00 mL of the stock solution and then diluted it with water to give 275.mL of a final solution.How many grams of NO3- ion are in the final solution?

Accepted Answer

A)  0.0247 g 
B)  0.0493 g 
C)  0.0678 g 
D)  0.136 g 
A)  0.0247 g 
B)  0.0493 g 
C)  0.0678 g 
D)  0.136 g

Question 8

Automotive air bags inflate when sodium azide decomposes explosively to its constituent elements: 2 NaN3(s)→ 2 Na(s)+ 3 N2(g)
How many moles of N2 are produced by the decomposition of 1.75 mol of sodium azide?

Accepted Answer

A)  1.17 
B)  5.25 
C)  2.63 
D)  0.583 
E)  0.875 
A)  1.17 
B)  5.25 
C)  2.63 
D)  0.583 
E)  0.875

Question 9

When 13.0 g of calcium metal is reacted with water,5.00 g of calcium hydroxide is produced.Using the following balanced equation,calculate the percent yield for the reaction? Ca(s)+ 2 H2O(l)→ Ca(OH)2(aq)+ H2(g)

Accepted Answer

A)  10.4% 
B)  20.8% 
C)  38.5% 
D)  71.1% 
A)  10.4% 
B)  20.8% 
C)  38.5% 
D)  71.1%

Question 10

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

Accepted Answer

A)  HI + KOH 
B)  K2S + HBr 
C)  K2CO3 + HNO3 
D)  MgCl2 + KOH 
E)  All of these solution pairs will produce a precipitate. 
A)  HI + KOH 
B)  K2S + HBr 
C)  K2CO3 + HNO3 
D)  MgCl2 + KOH 
E)  All of these solution pairs will produce a precipitate.

Question 11

What volume of a 0.540 M NaOH solution contains 12.5 g of NaOH?

Accepted Answer

A)  0.169 L 
B)  0.579 L 
C)  1.73 L 
D)  5.92 L 
A)  0.169 L 
B)  0.579 L 
C)  1.73 L 
D)  5.92 L

Question 12

What is the concentration of barium ions in a 0.750 M BaCl2 solution?

Accepted Answer

A)  0.750 M 
B)  0.375 M 
C)  2.25 M 
D)  1.50 M 
E)  0.160 M 
A)  0.750 M 
B)  0.375 M 
C)  2.25 M 
D)  1.50 M 
E)  0.160 M

Question 13

A 12.39 g sample of phosphorus reacts with 42.54 g of chlorine to form only phosphorus trichloride (PCl3).If it is the only product,what mass of PCl3 is formed?

Accepted Answer

A)  30.15 g 
B)  54.93 g 
C)  140.01 g 
D)  79.71 g 
E)  91.86 g 
A)  30.15 g 
B)  54.93 g 
C)  140.01 g 
D)  79.71 g 
E)  91.86 g

Question 14

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

Accepted Answer

A)  KOH + Na2S 
B)  (NH4)2SO4 + NaI 
C)  Pb(C2H3O2)2 + Li2SO4 
D)  KNO3 + NaOH 
E)  None of the above solution pairs will produce a precipitate. 
A)  KOH + Na2S 
B)  (NH4)2SO4 + NaI 
C)  Pb(C2H3O2)2 + Li2SO4 
D)  KNO3 + NaOH 
E)  None of the above solution pairs will produce a precipitate.

Question 15

Which of the following is an acid-base reaction?

Accepted Answer

A)  C(s) + O2(g) → CO2(g) 
B)  2 HClO4(aq) + Ca(OH)2(aq) → 2 H2O(l) + Ca(ClO4)2(aq) 
C)  Fe(s) + 2 AgNO3(aq) → 2 Ag(s) + Fe(NO3)2(aq) 
D)  MgSO4(aq) + Pb(NO3)2(aq) → Mg(NO3)2(aq) + PbSO4(s) 
E)  None of the above is an acid-base reaction. 
A)  C(s) + O2(g) → CO2(g) 
B)  2 HClO4(aq) + Ca(OH)2(aq) → 2 H2O(l) + Ca(ClO4)2(aq) 
C)  Fe(s) + 2 AgNO3(aq) → 2 Ag(s) + Fe(NO3)2(aq) 
D)  MgSO4(aq) + Pb(NO3)2(aq) → Mg(NO3)2(aq) + PbSO4(s) 
E)  None of the above is an acid-base reaction.

Question 16

Which of the compounds H2C2O4,Ra(OH)2,CsOH,and HI behave as bases when they are dissolved in water?

Accepted Answer

A)  Ra(OH)2 and CsOH 
B)  H2C2O4 and HI 
C)  only HI 
D)  only CsOH 
A)  Ra(OH)2 and CsOH 
B)  H2C2O4 and HI 
C)  only HI 
D)  only CsOH

Question 17

How many grams of Li3N can be formed from 1.75 moles of Li? Assume an excess of nitrogen. 6 Li(s)+ N2(g)→ 2 Li3N(s)

Accepted Answer

A)  18.3 g Li3N 
B)  20.3 g Li3N 
C)  58.3 g Li3N 
D)  61.0 g Li3N 
E)  15.1 g Li3N 
A)  18.3 g Li3N 
B)  20.3 g Li3N 
C)  58.3 g Li3N 
D)  61.0 g Li3N 
E)  15.1 g Li3N

Question 18

Determine the oxidation state of Mn in KMnO4.

Accepted Answer

Question 19

Identify an ethanol solution.

Accepted Answer

A)  weak electrolyte, weak acid 
B)  weak electrolyte, weak base 
C)  strong electrolyte, strong acid 
D)  strong electrolyte, strong base 
E)  nonelectrolyte 
A)  weak electrolyte, weak acid 
B)  weak electrolyte, weak base 
C)  strong electrolyte, strong acid 
D)  strong electrolyte, strong base 
E)  nonelectrolyte

Question 20

How many sodium ions are present in 30.0 mL of 0.600 M Na2CO3 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 
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

Exam 4: Chemical Quantities and Aqueous Reactions

What is the concentration of HCl in the final solution when 65 mL of a 9.0 M HCl solution is diluted with pure water to a total volume of 0.15 L?

How many moles of CuO can be produced from 0.450 mol of Cu2O in the following reaction? 2 Cu2O(s)+ O2(g)→ 4 CuO(s)

Which pair of compounds is soluble in water?

Determine the concentration of a solution prepared by diluting 25.0 mL of a stock 0.188 M Sr(NO3)2 solution to 150.0 mL.

Which of the following compounds is insoluble in water?

Give the percent yield when 28.16 g of CO2 are formed from the reaction of 5.000 moles of C8H18 with 5.000 moles of O2. 2 C8H18 + 25 O2 → 16 CO2 + 18 H2O

A student dissolved 5.00 g of Co(NO3)2 in enough water to make 100.mL of stock solution.He took 4.00 mL of the stock solution and then diluted it with water to give 275.mL of a final solution.How many grams of NO3- ion are in the final solution?

Automotive air bags inflate when sodium azide decomposes explosively to its constituent elements: 2 NaN3(s)→ 2 Na(s)+ 3 N2(g) How many moles of N2 are produced by the decomposition of 1.75 mol of sodium azide?

When 13.0 g of calcium metal is reacted with water,5.00 g of calcium hydroxide is produced.Using the following balanced equation,calculate the percent yield for the reaction? Ca(s)+ 2 H2O(l)→ Ca(OH)2(aq)+ H2(g)

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

What volume of a 0.540 M NaOH solution contains 12.5 g of NaOH?

What is the concentration of barium ions in a 0.750 M BaCl2 solution?

A 12.39 g sample of phosphorus reacts with 42.54 g of chlorine to form only phosphorus trichloride (PCl3).If it is the only product,what mass of PCl3 is formed?

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

Which of the following is an acid-base reaction?

Which of the compounds H2C2O4,Ra(OH)2,CsOH,and HI behave as bases when they are dissolved in water?

How many grams of Li3N can be formed from 1.75 moles of Li? Assume an excess of nitrogen. 6 Li(s)+ N2(g)→ 2 Li3N(s)

Determine the oxidation state of Mn in KMnO4.

Identify an ethanol solution.

How many sodium ions are present in 30.0 mL of 0.600 M Na2CO3 solution?

Matter, measurement, and Problem Solving

Atoms and Elements

Molecules,compounds,and Chemical Equations

Gases

Thermochemistry

The Quantum-Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding I: Lewis Theory

Chemical Bonding Ii: Molecular Shapes,valence Bond Theory,

Liquids,solids,and Intermolecular Forces

Solids and Modern Materials

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry

Biochemistry

Chemistry of the Nonmetals

Metals and Metallurgy

Transition Metals and Coordination Compounds

Filters

How many moles of CuO can be produced from 0.450 mol of Cu₂O in the following reaction? 2 Cu₂O(s)+ O₂(g)→ 4 CuO(s)

Determine the concentration of a solution prepared by diluting 25.0 mL of a stock 0.188 M Sr(NO₃)₂ solution to 150.0 mL.

Give the percent yield when 28.16 g of CO₂ are formed from the reaction of 5.000 moles of C₈H₁₈ with 5.000 moles of O₂. 2 C₈H₁₈ + 25 O₂ → 16 CO₂ + 18 H₂O

A student dissolved 5.00 g of Co(NO₃)₂ in enough water to make 100.mL of stock solution.He took 4.00 mL of the stock solution and then diluted it with water to give 275.mL of a final solution.How many grams of NO₃^- ion are in the final solution?

Automotive air bags inflate when sodium azide decomposes explosively to its constituent elements: 2 NaN₃(s)→ 2 Na(s)+ 3 N₂(g) How many moles of N₂ are produced by the decomposition of 1.75 mol of sodium azide?

When 13.0 g of calcium metal is reacted with water,5.00 g of calcium hydroxide is produced.Using the following balanced equation,calculate the percent yield for the reaction? Ca(s)+ 2 H₂O(l)→ Ca(OH)₂(aq)+ H₂(g)

What is the concentration of barium ions in a 0.750 M BaCl₂ solution?

A 12.39 g sample of phosphorus reacts with 42.54 g of chlorine to form only phosphorus trichloride (PCl₃).If it is the only product,what mass of PCl₃ is formed?

Which of the compounds H₂C₂O₄,Ra(OH)₂,CsOH,and HI behave as bases when they are dissolved in water?

How many grams of Li₃N can be formed from 1.75 moles of Li? Assume an excess of nitrogen. 6 Li(s)+ N₂(g)→ 2 Li₃N(s)

Determine the oxidation state of Mn in KMnO₄.

How many sodium ions are present in 30.0 mL of 0.600 M Na₂CO₃ solution?