Question 1

Determine the molarity of a solution formed by dissolving 3.00 moles of NaCl in enough water to yield 4.00 L of solution.

Accepted Answer

A)  1.33 M 
B)  2.00 M 
C)  0.750 M 
D)  3.00 M 
E)  12.00 M 
A)  1.33 M 
B)  2.00 M 
C)  0.750 M 
D)  3.00 M 
E)  12.00 M

Question 2

Give the net ionic equation for the reaction (if any)that occurs when aqueous solutions of Na2CO3 and HCl are mixed.

Accepted Answer

A)  2 Na+(aq) + CO32-(aq) + 2 H+(aq) + 2 Cl-(aq) → H2O(l) + CO2(g) + 2 Na+(aq) + 2 Cl-(aq) 
B)  2 Na+(aq) + CO32-(aq) + 2 H+(aq) + 2 Cl-(aq) → H2CO3(s) + 2 NaCl(s) 
C)  2 H+(aq) + CO32-(aq) → H2O(l) + CO2(g) 
D)  2 Na+(aq) + CO32-(aq) + 2 H+(aq) + 2 Cl-(aq) → H2CO3(s) + 2 Na+(aq) + 2 Cl-(aq) 
E)  No reaction occurs. 
A)  2 Na+(aq) + CO32-(aq) + 2 H+(aq) + 2 Cl-(aq) → H2O(l) + CO2(g) + 2 Na+(aq) + 2 Cl-(aq) 
B)  2 Na+(aq) + CO32-(aq) + 2 H+(aq) + 2 Cl-(aq) → H2CO3(s) + 2 NaCl(s) 
C)  2 H+(aq) + CO32-(aq) → H2O(l) + CO2(g) 
D)  2 Na+(aq) + CO32-(aq) + 2 H+(aq) + 2 Cl-(aq) → H2CO3(s) + 2 Na+(aq) + 2 Cl-(aq) 
E)  No reaction occurs.

Question 3

How many grams of H3PO4 are in 255 mL of a 4.50 M solution of H3PO4?

Accepted Answer

A)  112 g 
B)  1.15 g 
C)  441 g 
D)  4.50 g 
E)  400 g 
A)  112 g 
B)  1.15 g 
C)  441 g 
D)  4.50 g 
E)  400 g

Question 4

Automotive air bags inflate when sodium azide decomposes explosively to its constituent elements: 2 NaN3(s)→ 2 Na(s)+ 3 N2(g)
How many grams of sodium azide are required to produce 25.0 g of nitrogen?

Accepted Answer

A)  1.34 
B)  0.595 
C)  58.0 
D)  38.7 
E)  87.0 
A)  1.34 
B)  0.595 
C)  58.0 
D)  38.7 
E)  87.0

Question 5

How many grams of water react to form 6.21 moles of Ca(OH)2? CaO(s)+ H2O(l)→ Ca(OH)2(s)

Accepted Answer

A)  6.21 g of H2O 
B)  24.8 g of H2O 
C)  49.7 g of H2O 
D)  112 g of H2O 
E)  99.4 g of H2O 
A)  6.21 g of H2O 
B)  24.8 g of H2O 
C)  49.7 g of H2O 
D)  112 g of H2O 
E)  99.4 g of H2O

Question 6

Which one of the following compounds is soluble in water?

Accepted Answer

A)  Cu3(PO4)2 
B)  FeS 
C)  Cu(NO3)2 
D)  SrCO3 
A)  Cu3(PO4)2 
B)  FeS 
C)  Cu(NO3)2 
D)  SrCO3

Question 7

Silver ions can be precipitated from aqueous solutions by the addition of aqueous chloride: Ag+(aq)+ Cl-(aq)→ AgCl(s)
Silver chloride is virtually insoluble in water so that the reaction appears to go to completion.How many grams of solid NaCl must be added to 25.0 mL of 0.125 M AgNO3 solution to completely precipitate the silver?

Accepted Answer

A)  3.13 × 10-3 g 
B)  5.35 × 10-5 g 
C)  0.183 g 
D)  0.0535 g 
E)  1.87 × 104 g 
A)  3.13 × 10-3 g 
B)  5.35 × 10-5 g 
C)  0.183 g 
D)  0.0535 g 
E)  1.87 × 104 g

Question 8

Choose the reaction that represents the combustion of C6H12O2.

Accepted Answer

A)  C6H12O2(l) + 8 O2(g) → 6 CO2(g) + 6 H2O(g) 
B)  Mg(s) + C6H12O2(l) → MgC6H12O2(aq) 
C)  6 C(s) + 6 H2(g) + O2(g) → C6H12O2(l) 
D)  C6H12O2(l) → 6 C(s) + 6 H2(g) + O2(g) 
E)  None of the above represents the combustion of C6H12O2. 
A)  C6H12O2(l) + 8 O2(g) → 6 CO2(g) + 6 H2O(g) 
B)  Mg(s) + C6H12O2(l) → MgC6H12O2(aq) 
C)  6 C(s) + 6 H2(g) + O2(g) → C6H12O2(l) 
D)  C6H12O2(l) → 6 C(s) + 6 H2(g) + O2(g) 
E)  None of the above represents the combustion of C6H12O2.

Question 9

How many aluminum ions are present in 65.5 mL of 0.210 M AlBr3 solution?

Accepted Answer

A)  4.02 × 1023 aluminum ions 
B)  5.79 × 1024 aluminum ions 
C)  2.48 × 1022 aluminum ions 
D)  8.28 × 1021 aluminum ions 
E)  1.21 × 1022 aluminum ions 
A)  4.02 × 1023 aluminum ions 
B)  5.79 × 1024 aluminum ions 
C)  2.48 × 1022 aluminum ions 
D)  8.28 × 1021 aluminum ions 
E)  1.21 × 1022 aluminum ions

Question 10

Describe the greenhouse effect.

Accepted Answer

Greenhouse gases allow visible

Question 11

Give the spectator ions for the reaction that occurs when aqueous solutions of MgSO3 and HI are mixed.

Accepted Answer

A)  H+ and SO32- 
B)  Mg2+ and I- 
C)  H+ and I- 
D)  SO32- and Mg2+ 
E)  No spectator ions are present. 
A)  H+ and SO32- 
B)  Mg2+ and I- 
C)  H+ and I- 
D)  SO32- and Mg2+ 
E)  No spectator ions are present.

Question 12

Determine the molarity of a solution formed by dissolving 97.7 g LiBr in enough water to yield 750.0 mL of solution.

Accepted Answer

A)  1.50 M 
B)  1.18 M 
C)  0.130 M 
D)  0.768 M 
E)  2.30 M 
A)  1.50 M 
B)  1.18 M 
C)  0.130 M 
D)  0.768 M 
E)  2.30 M

Question 13

How many molecules of sucrose (C12H22O11,molar mass = 342.30 g/mol)are contained in 14.3 mL of 0.140 M sucrose solution?

Accepted Answer

A)  8.29 × 1022 molecules C12H22O11 
B)  1.21 × 1021 molecules C12H22O11 
C)  6.15 × 1022 molecules C12H22O11 
D)  1.63 × 1023 molecules C12H22O11 
E)  5.90 × 1024 molecules C12H22O11 
A)  8.29 × 1022 molecules C12H22O11 
B)  1.21 × 1021 molecules C12H22O11 
C)  6.15 × 1022 molecules C12H22O11 
D)  1.63 × 1023 molecules C12H22O11 
E)  5.90 × 1024 molecules C12H22O11

Question 14

When 8.00 × 1022 molecules of ammonia react with 7.00 × 1022 molecules of oxygen according to the chemical equation shown below,how many grams of nitrogen gas are produced? 4 NH3(g)+ 3 O2(g)→ 2 N2(g)+ 6 H2O(g)

Accepted Answer

A)  1.86 g 
B)  2.17 g 
C)  4.88 g 
D)  7.44 g 
A)  1.86 g 
B)  2.17 g 
C)  4.88 g 
D)  7.44 g

Question 15

What causes a precipitation reaction to occur between two soluble compounds?

Accepted Answer

A precipitate,or insoluble com

Question 16

According to the following balanced reaction,how many moles of CaO are required to exactly react with 3.22 moles of H2O? CaO(s)+ H2O(l)→ Ca(OH)2(s)

Accepted Answer

A)  3.22 moles of CaO 
B)  6.44 moles of CaO 
C)  12.9 moles of CaO 
D)  1.61 moles of CaO 
E)  0.70 moles of CaO 
A)  3.22 moles of CaO 
B)  6.44 moles of CaO 
C)  12.9 moles of CaO 
D)  1.61 moles of CaO 
E)  0.70 moles of CaO

Question 17

What is the concentration (M)of a NaCl solution prepared by dissolving 5.3 g of NaCl in sufficient water to give 115 mL of solution?

Accepted Answer

A)  0.091 M 
B)  5.3 M 
C)  0.79 M 
D)  5.5 M 
E)  0.115 M 
A)  0.091 M 
B)  5.3 M 
C)  0.79 M 
D)  5.5 M 
E)  0.115 M

Question 18

Pure acetic acid (HC2H3O2)is a liquid and is known as glacial acetic acid.Calculate the molarity of a solution prepared by dissolving 1.00 mL of glacial acetic acid at 25°C in sufficient water to give 500.0 mL of solution.The density of glacial acetic acid at 25°C is 1.05 g/mL.

Accepted Answer

A)  126 M 
B)  2.10 M 
C)  2.10 × 10-3 M 
D)  0.0350 M 
E)  3.50 × 10-5 M 
A)  126 M 
B)  2.10 M 
C)  2.10 × 10-3 M 
D)  0.0350 M 
E)  3.50 × 10-5 M

Question 19

According to the following balanced reaction,how many moles of Ca(OH)2 will be formed from 3.22 moles of H2O? CaO(s)+ H2O(l)→ Ca(OH)2(s)

Accepted Answer

A)  3.22 moles of Ca(OH)2 
B)  6.44 moles of Ca(OH)2 
C)  12.9 moles of Ca(OH)2 
D)  1.61 moles of Ca(OH)2 
E)  0.53 moles of Ca(OH)2 
A)  3.22 moles of Ca(OH)2 
B)  6.44 moles of Ca(OH)2 
C)  12.9 moles of Ca(OH)2 
D)  1.61 moles of Ca(OH)2 
E)  0.53 moles of Ca(OH)2

Question 20

10 g of nitrogen is reacted with 5.0 g of hydrogen to produce ammonia according to the chemical equation shown below.Which one of the following statements is FALSE? N2(g)+ 3 H2(g)→ 2 NH3(g)

Accepted Answer

A)  2.8 g of hydrogen are left over. 
B)  Hydrogen is the excess reactant. 
C)  Nitrogen is the limiting reactant. 
D)  The theoretical yield of ammonia is 15 g. 
A)  2.8 g of hydrogen are left over. 
B)  Hydrogen is the excess reactant. 
C)  Nitrogen is the limiting reactant. 
D)  The theoretical yield of ammonia is 15 g.

Exam 4: Chemical Quantities and Aqueous Reactions

Determine the molarity of a solution formed by dissolving 3.00 moles of NaCl in enough water to yield 4.00 L of solution.

Give the net ionic equation for the reaction (if any)that occurs when aqueous solutions of Na2CO3 and HCl are mixed.

How many grams of H3PO4 are in 255 mL of a 4.50 M solution of H3PO4?

Automotive air bags inflate when sodium azide decomposes explosively to its constituent elements: 2 NaN3(s)→ 2 Na(s)+ 3 N2(g) How many grams of sodium azide are required to produce 25.0 g of nitrogen?

How many grams of water react to form 6.21 moles of Ca(OH)2? CaO(s)+ H2O(l)→ Ca(OH)2(s)

Which one of the following compounds is soluble in water?

Choose the reaction that represents the combustion of C6H12O2.

How many aluminum ions are present in 65.5 mL of 0.210 M AlBr3 solution?

Describe the greenhouse effect.

Give the spectator ions for the reaction that occurs when aqueous solutions of MgSO3 and HI are mixed.

Determine the molarity of a solution formed by dissolving 97.7 g LiBr in enough water to yield 750.0 mL of solution.

How many molecules of sucrose (C12H22O11,molar mass = 342.30 g/mol)are contained in 14.3 mL of 0.140 M sucrose solution?

When 8.00 × 1022 molecules of ammonia react with 7.00 × 1022 molecules of oxygen according to the chemical equation shown below,how many grams of nitrogen gas are produced? 4 NH3(g)+ 3 O2(g)→ 2 N2(g)+ 6 H2O(g)

What causes a precipitation reaction to occur between two soluble compounds?

According to the following balanced reaction,how many moles of CaO are required to exactly react with 3.22 moles of H2O? CaO(s)+ H2O(l)→ Ca(OH)2(s)

What is the concentration (M)of a NaCl solution prepared by dissolving 5.3 g of NaCl in sufficient water to give 115 mL of solution?

Pure acetic acid (HC2H3O2)is a liquid and is known as glacial acetic acid.Calculate the molarity of a solution prepared by dissolving 1.00 mL of glacial acetic acid at 25°C in sufficient water to give 500.0 mL of solution.The density of glacial acetic acid at 25°C is 1.05 g/mL.

According to the following balanced reaction,how many moles of Ca(OH)2 will be formed from 3.22 moles of H2O? CaO(s)+ H2O(l)→ Ca(OH)2(s)

10 g of nitrogen is reacted with 5.0 g of hydrogen to produce ammonia according to the chemical equation shown below.Which one of the following statements is FALSE? N2(g)+ 3 H2(g)→ 2 NH3(g)

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Periodic Properties of the Elements

Chemical Bonding I: Lewis Theory

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Give the net ionic equation for the reaction (if any)that occurs when aqueous solutions of Na₂CO₃ and HCl are mixed.

How many grams of H₃PO₄ are in 255 mL of a 4.50 M solution of H₃PO₄?

Automotive air bags inflate when sodium azide decomposes explosively to its constituent elements: 2 NaN₃(s)→ 2 Na(s)+ 3 N₂(g) How many grams of sodium azide are required to produce 25.0 g of nitrogen?

How many grams of water react to form 6.21 moles of Ca(OH)₂? CaO(s)+ H₂O(l)→ Ca(OH)₂(s)

Choose the reaction that represents the combustion of C₆H₁₂O₂.

How many aluminum ions are present in 65.5 mL of 0.210 M AlBr₃ solution?

Give the spectator ions for the reaction that occurs when aqueous solutions of MgSO₃ and HI are mixed.

How many molecules of sucrose (C₁₂H₂₂O₁₁,molar mass = 342.30 g/mol)are contained in 14.3 mL of 0.140 M sucrose solution?

When 8.00 × 10²² molecules of ammonia react with 7.00 × 10²² molecules of oxygen according to the chemical equation shown below,how many grams of nitrogen gas are produced? 4 NH₃(g)+ 3 O₂(g)→ 2 N₂(g)+ 6 H₂O(g)

According to the following balanced reaction,how many moles of CaO are required to exactly react with 3.22 moles of H₂O? CaO(s)+ H₂O(l)→ Ca(OH)₂(s)

Pure acetic acid (HC₂H₃O₂)is a liquid and is known as glacial acetic acid.Calculate the molarity of a solution prepared by dissolving 1.00 mL of glacial acetic acid at 25°C in sufficient water to give 500.0 mL of solution.The density of glacial acetic acid at 25°C is 1.05 g/mL.

According to the following balanced reaction,how many moles of Ca(OH)₂ will be formed from 3.22 moles of H₂O? CaO(s)+ H₂O(l)→ Ca(OH)₂(s)

10 g of nitrogen is reacted with 5.0 g of hydrogen to produce ammonia according to the chemical equation shown below.Which one of the following statements is FALSE? N₂(g)+ 3 H₂(g)→ 2 NH₃(g)