Question 1

The titration of 25.00 mL of 0.2215 M HCl required 28.84 mL of NaOH for neutralization. What is the molarity of the NaOH?

Accepted Answer

A)  0.2555 
B)  0.03255 
C)  4.004 
D)  0.1920 
A)  0.2555 
B)  0.03255 
C)  4.004 
D)  0.1920 D

Question 2

Given that: 3 NO2( g ) + H2O( l ) → 2 HNO3( aq )+ NO( g ), what quantity (L) of NO2 is required to completely react 125 grams of water. Assume that the gases are at standard temperature and pressure and hence 1.00 mole occupies 22.4 L of volume.

Accepted Answer

A)  466 L 
B)  155 L 
C)  311 L 
D)  4.82 L 
A)  466 L 
B)  155 L 
C)  311 L 
D)  4.82 L A

Question 3

Given that: NaClO( aq ) + HCl( aq ) → NaCl( aq ) + HClO( aq ), how many mL of 6.00 M HCl is required to neutralize 25.00 mL of 2.35 M NaClO

Accepted Answer

A)  9.79 mL 
B)  11.7 mL 
C)  63.8 mL 
D)  117 mL 
A)  9.79 mL 
B)  11.7 mL 
C)  63.8 mL 
D)  117 mL A

Question 4

Consider: Cl2O5 + H2O → HClO3. How many moles of HClO3 are produced from 2.5 moles of Cl2O5 reacting with excess water?

Accepted Answer

A)  1.3 
B)  2.5 
C)  5.0 
D)  6.0 
A)  1.3 
B)  2.5 
C)  5.0 
D)  6.0

Question 5

Alkanes contain only carbon, hydrogen, and single bonds.

Accepted Answer

A) True 
 B)False

Question 6

If 8.42 × 10 − 2 moles of aluminum react with 1.77 × 10 − 2 moles of chlorine gas, how many moles of AlCl3 may form?

Accepted Answer

A)  6.50 × 10 − 2 
B)  8.42 × 10 − 2 
C)  1.77 × 10 − 2 
D)  1.18 × 10 − 2 
A)  6.50 × 10 − 2 
B)  8.42 × 10 − 2 
C)  1.77 × 10 − 2 
D)  1.18 × 10 − 2

Question 7

If 4.21 × 10 − 3 moles of Ca2+ reacts with excess PO43 −  to form calcium phosphate, how many moles of the solid will form?

Accepted Answer

A)  3.04 × 10 − 2 
B)  6.74 × 10 − 3 
C)  1.40 × 10 − 3 
D)  4.21 × 10 − 3 
A)  3.04 × 10 − 2 
B)  6.74 × 10 − 3 
C)  1.40 × 10 − 3 
D)  4.21 × 10 − 3

Question 8

If: 4C + S8 → 4CS2, how many moles of S8 are required for the formation of 6.75 moles of CS2?

Accepted Answer

A)  15.0 
B)  13.5 
C)  1.69 
D)  2.00 
A)  15.0 
B)  13.5 
C)  1.69 
D)  2.00

Question 9

What is the theoretical yield of AgCl if 30.2 mL of 0.1000 M AgNO3 reacts with an excess of 0.10000 M HCl?

Accepted Answer

A)  220 mg 
B)  433 mg 
C)  43.8 mg 
D)  915 mg 
A)  220 mg 
B)  433 mg 
C)  43.8 mg 
D)  915 mg

Question 10

A 118.63 g of SrCl2 ∙ 6H2O was heated and 34.81 grams of water were recovered from the sample. What percent of the original H2O remains in the sample following this heating?

Accepted Answer

A)  27.61% 
B)  38.15% 
C)  72.38% 
D)  86.19% 
A)  27.61% 
B)  38.15% 
C)  72.38% 
D)  86.19%

Question 11

A 25.00 mL sample of vinegar is titrated to neutralization with 22.64 mL of 2.00 M NaOH. What is the molarity of the vinegar?

Accepted Answer

A)  1.66 
B)  2.21 
C)  2.83 
D)  1.81 
A)  1.66 
B)  2.21 
C)  2.83 
D)  1.81

Question 12

Limestone (CaCO3) emits CO2 gas when exposed to HCl. What is the theoretical yield of CO2 if 9.45 grams of limestone is completely dissolved in HCl?
CaCO3( s ) + 2 HCl( aq ) → CaCl2( aq ) + CO2( g ) + H2O( l )

Accepted Answer

A)  21.5 g 
B)  4.16 g 
C)  9.53 g 
D)  24.7 g 
A)  21.5 g 
B)  4.16 g 
C)  9.53 g 
D)  24.7 g

Question 13

Automobile air bags employ a chemical reaction involving the rapid decomposition of sodium azide (NaN3) into sodium metal and nitrogen gas to inflate in a collision. How much sodium azide is required to decompose to inflate a 20.0 L air bag? Assume that the gas is at standard temperature and pressure, and thus occupies 22.4 L per mole.

Accepted Answer

A)  76.3 g 
B)  42.8 g 
C)  38.7 g 
D)  62.7 g 
A)  76.3 g 
B)  42.8 g 
C)  38.7 g 
D)  62.7 g

Question 14

A limiting reactant is completely consumed in the course of a reaction and may be used to determine how much product(s) may be produced.

Accepted Answer

A) True 
 B)False

Question 15

The Haber process is used to synthesize ammonia from hydrogen and nitrogen. How much hydrogen is required to produce 42.8 kg of ammonia?

Accepted Answer

A)  56.02 kg 
B)  42.8 kg 
C)  35.25 kg 
D)  7.60 kg 
A)  56.02 kg 
B)  42.8 kg 
C)  35.25 kg 
D)  7.60 kg

Question 16

Ammonia is manufactured using the reaction:
N2 + 3 H2 → 2 NH3.
How much ammonia can be produced in the reaction of 2.04 × 10 − 3 mol of nitrogen and 6.83 × 10 − 3 mol of hydrogen?

Accepted Answer

A)  4.08 × 10 − 3 mol 
B)  5.20 × 10 − 3 mol 
C)  6.83 × 10 − 3 mol 
D)  7.47 × 10 − 3 mol 
A)  4.08 × 10 − 3 mol 
B)  5.20 × 10 − 3 mol 
C)  6.83 × 10 − 3 mol 
D)  7.47 × 10 − 3 mol

Question 17

Given the formation of Al2O3 from a reaction between aluminum and oxygen, how many moles of the oxide can form using this reaction if 26.2 moles of Al metal react in an unlimited amount of oxygen?

Accepted Answer

A)  26.2 
B)  3.28 
C)  13.1 
D)  4.91 
A)  26.2 
B)  3.28 
C)  13.1 
D)  4.91

Question 18

If liquid mercury and oxygen combine to make mercury(II) oxide, what is the percent yield of HgO if 350.0 grams of Hg( l ) react with 150.0 g of O2( g ) to produce 272.3 grams of the product?

Accepted Answer

A)  72.07% 
B)  44.03% 
C)  13.39% 
D)  66.76% 
A)  72.07% 
B)  44.03% 
C)  13.39% 
D)  66.76%

Question 19

During a tuning test an automobile engine consumes 4.40 × 10 − 3 mol of octane and 5.50 × 10 − 2 mol of oxygen. What condition best describes the fuel mix?

Accepted Answer

A)  too lean (too much oxygen) 
B)  reasonably correct 
C)  too rich (too little oxygen) 
A)  too lean (too much oxygen) 
B)  reasonably correct 
C)  too rich (too little oxygen)

Question 20

Nitroglycerin detonates according to the balanced reaction:
4 C3H5N3O9( l ) → 12 CO2( g ) + 6 N2( g ) + O2( g )+ 10 H2O( g ).
If 1.00 kg of nitroglycerin is detonated, how many L of products (assume all gases at standard temperature and pressure, so 1.00 mole = 22.4 L of volume) are released?

Accepted Answer

A)  107 L 
B)  428 L 
C)  715 L 
D)  1000 L 
A)  107 L 
B)  428 L 
C)  715 L 
D)  1000 L

The titration of 25.00 mL of 0.2215 M HCl required 28.84 mL of NaOH for neutralization. What is the molarity of the NaOH?

Given that: 3 NO₂( g ) + H₂O( l ) → 2 HNO₃( aq )+ NO( g ), what quantity (L) of NO₂ is required to completely react 125 grams of water. Assume that the gases are at standard temperature and pressure and hence 1.00 mole occupies 22.4 L of volume.

Given that: NaClO( aq ) + HCl( aq ) → NaCl( aq ) + HClO( aq ), how many mL of 6.00 M HCl is required to neutralize 25.00 mL of 2.35 M NaClO

Consider: Cl₂O₅ + H₂O → HClO₃. How many moles of HClO₃ are produced from 2.5 moles of Cl₂O₅ reacting with excess water?

Alkanes contain only carbon, hydrogen, and single bonds.

If 8.42 × 10^{− 2} moles of aluminum react with 1.77 × 10^{− 2} moles of chlorine gas, how many moles of AlCl₃ may form?

If 4.21 × 10^{− 3} moles of Ca²⁺ reacts with excess PO₄^{3 −} to form calcium phosphate, how many moles of the solid will form?

If: 4C + S₈ → 4CS₂, how many moles of S₈ are required for the formation of 6.75 moles of CS₂?

What is the theoretical yield of AgCl if 30.2 mL of 0.1000 M AgNO₃ reacts with an excess of 0.10000 M HCl?

A 118.63 g of SrCl₂ ∙ 6H₂O was heated and 34.81 grams of water were recovered from the sample. What percent of the original H₂O remains in the sample following this heating?

A 25.00 mL sample of vinegar is titrated to neutralization with 22.64 mL of 2.00 M NaOH. What is the molarity of the vinegar?

Limestone (CaCO₃) emits CO₂ gas when exposed to HCl. What is the theoretical yield of CO₂ if 9.45 grams of limestone is completely dissolved in HCl? CaCO₃( s ) + 2 HCl( aq ) → CaCl₂( aq ) + CO₂( g ) + H₂O( l )

A limiting reactant is completely consumed in the course of a reaction and may be used to determine how much product(s) may be produced.

The Haber process is used to synthesize ammonia from hydrogen and nitrogen. How much hydrogen is required to produce 42.8 kg of ammonia?

Ammonia is manufactured using the reaction: N₂ + 3 H₂ → 2 NH₃. How much ammonia can be produced in the reaction of 2.04 × 10^{− 3} mol of nitrogen and 6.83 × 10^{− 3} mol of hydrogen?

Given the formation of Al₂O₃ from a reaction between aluminum and oxygen, how many moles of the oxide can form using this reaction if 26.2 moles of Al metal react in an unlimited amount of oxygen?

If liquid mercury and oxygen combine to make mercury(II) oxide, what is the percent yield of HgO if 350.0 grams of Hg( l ) react with 150.0 g of O₂( g ) to produce 272.3 grams of the product?

During a tuning test an automobile engine consumes 4.40 × 10^{− 3} mol of octane and 5.50 × 10^{− 2} mol of oxygen. What condition best describes the fuel mix?

Introduction to Chemistry

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Exam 4: Stoichiometry

The titration of 25.00 mL of 0.2215 M HCl required 28.84 mL of NaOH for neutralization. What is the molarity of the NaOH?

Given that: 3 NO2( g ) + H2O( l ) → 2 HNO3( aq )+ NO( g ), what quantity (L) of NO2 is required to completely react 125 grams of water. Assume that the gases are at standard temperature and pressure and hence 1.00 mole occupies 22.4 L of volume.

Given that: NaClO( aq ) + HCl( aq ) → NaCl( aq ) + HClO( aq ), how many mL of 6.00 M HCl is required to neutralize 25.00 mL of 2.35 M NaClO

Consider: Cl2O5 + H2O → HClO3. How many moles of HClO3 are produced from 2.5 moles of Cl2O5 reacting with excess water?

Alkanes contain only carbon, hydrogen, and single bonds.

If 8.42 × 10 − 2 moles of aluminum react with 1.77 × 10 − 2 moles of chlorine gas, how many moles of AlCl3 may form?

If 4.21 × 10 − 3 moles of Ca2+ reacts with excess PO43 − to form calcium phosphate, how many moles of the solid will form?

If: 4C + S8 → 4CS2, how many moles of S8 are required for the formation of 6.75 moles of CS2?

What is the theoretical yield of AgCl if 30.2 mL of 0.1000 M AgNO3 reacts with an excess of 0.10000 M HCl?

A 118.63 g of SrCl2 ∙ 6H2O was heated and 34.81 grams of water were recovered from the sample. What percent of the original H2O remains in the sample following this heating?

A 25.00 mL sample of vinegar is titrated to neutralization with 22.64 mL of 2.00 M NaOH. What is the molarity of the vinegar?

Limestone (CaCO3) emits CO2 gas when exposed to HCl. What is the theoretical yield of CO2 if 9.45 grams of limestone is completely dissolved in HCl? CaCO3( s ) + 2 HCl( aq ) → CaCl2( aq ) + CO2( g ) + H2O( l )

A limiting reactant is completely consumed in the course of a reaction and may be used to determine how much product(s) may be produced.

The Haber process is used to synthesize ammonia from hydrogen and nitrogen. How much hydrogen is required to produce 42.8 kg of ammonia?

Ammonia is manufactured using the reaction: N2 + 3 H2 → 2 NH3. How much ammonia can be produced in the reaction of 2.04 × 10 − 3 mol of nitrogen and 6.83 × 10 − 3 mol of hydrogen?

Given the formation of Al2O3 from a reaction between aluminum and oxygen, how many moles of the oxide can form using this reaction if 26.2 moles of Al metal react in an unlimited amount of oxygen?

If liquid mercury and oxygen combine to make mercury(II) oxide, what is the percent yield of HgO if 350.0 grams of Hg( l ) react with 150.0 g of O2( g ) to produce 272.3 grams of the product?

During a tuning test an automobile engine consumes 4.40 × 10 − 3 mol of octane and 5.50 × 10 − 2 mol of oxygen. What condition best describes the fuel mix?

Nitroglycerin detonates according to the balanced reaction: 4 C3H5N3O9( l ) → 12 CO2( g ) + 6 N2( g ) + O2( g )+ 10 H2O( g ). If 1.00 kg of nitroglycerin is detonated, how many L of products (assume all gases at standard temperature and pressure, so 1.00 mole = 22.4 L of volume) are released?

Introduction to Chemistry

Atoms and Molecules

Molecules Moles Chemical Equations

Gases

The Periodic Table and Atomic Structure

Chemical Bonding and Molecular Structure

Molecules and Materials

Energy and Chemistry

Entropy and the Second Law of Thermodynamics

Chemical Kinetics

Chemical Equilibrium

Electrochemistry

Filters

Given that: 3 NO₂( g ) + H₂O( l ) → 2 HNO₃( aq )+ NO( g ), what quantity (L) of NO₂ is required to completely react 125 grams of water. Assume that the gases are at standard temperature and pressure and hence 1.00 mole occupies 22.4 L of volume.

Consider: Cl₂O₅ + H₂O → HClO₃. How many moles of HClO₃ are produced from 2.5 moles of Cl₂O₅ reacting with excess water?

If 8.42 × 10^{− 2} moles of aluminum react with 1.77 × 10^{− 2} moles of chlorine gas, how many moles of AlCl₃ may form?

If 4.21 × 10^{− 3} moles of Ca²⁺ reacts with excess PO₄^{3 −} to form calcium phosphate, how many moles of the solid will form?

If: 4C + S₈ → 4CS₂, how many moles of S₈ are required for the formation of 6.75 moles of CS₂?

What is the theoretical yield of AgCl if 30.2 mL of 0.1000 M AgNO₃ reacts with an excess of 0.10000 M HCl?

A 118.63 g of SrCl₂ ∙ 6H₂O was heated and 34.81 grams of water were recovered from the sample. What percent of the original H₂O remains in the sample following this heating?

Limestone (CaCO₃) emits CO₂ gas when exposed to HCl. What is the theoretical yield of CO₂ if 9.45 grams of limestone is completely dissolved in HCl? CaCO₃( s ) + 2 HCl( aq ) → CaCl₂( aq ) + CO₂( g ) + H₂O( l )

Ammonia is manufactured using the reaction: N₂ + 3 H₂ → 2 NH₃. How much ammonia can be produced in the reaction of 2.04 × 10^{− 3} mol of nitrogen and 6.83 × 10^{− 3} mol of hydrogen?

Given the formation of Al₂O₃ from a reaction between aluminum and oxygen, how many moles of the oxide can form using this reaction if 26.2 moles of Al metal react in an unlimited amount of oxygen?

If liquid mercury and oxygen combine to make mercury(II) oxide, what is the percent yield of HgO if 350.0 grams of Hg( l ) react with 150.0 g of O₂( g ) to produce 272.3 grams of the product?

During a tuning test an automobile engine consumes 4.40 × 10^{− 3} mol of octane and 5.50 × 10^{− 2} mol of oxygen. What condition best describes the fuel mix?