Question 1

Which one of the following compounds is a hydrate?

Accepted Answer

A) H2O2 
B) H2SO4 
C) CoCl2 ∙ 6 H2O 
D) Cu(OH)2 
A) H2O2 
B) H2SO4 
C) CoCl2 ∙ 6 H2O 
D) Cu(OH)2 C

Question 2

-Which element shown on the periodic table above forms a covalent binary hydride with the formula MX3?

Accepted Answer

A) element A 
B) element B 
C) element C 
D) element D 
A) element A 
B) element B 
C) element C 
D) element D D

Question 3

-From the above models of hydrides,indicate the one most representative of an interstitial metallic hydride.

Accepted Answer

A) I 
B) II 
C) III 
D) IV 
A) I 
B) II 
C) III 
D) IV B

Question 4

What is not a characteristic of ozone,O3?

Accepted Answer

A) It is a nonlinear triatomic system. 
B) It has one single bond and one double bond. 
C) It is an extremely powerful oxidizing agent. 
D) It is made by passing an electrical discharge through oxygen. 
A) It is a nonlinear triatomic system. 
B) It has one single bond and one double bond. 
C) It is an extremely powerful oxidizing agent. 
D) It is made by passing an electrical discharge through oxygen.

Question 5

Which has the greatest number of unpaired electrons?

Accepted Answer

A) O2- 
B) O2 
C) O2- 
D) O22- 
A) O2- 
B) O2 
C) O2- 
D) O22-

Question 6

Compounds that absorb water from the atmosphere are said to be

Accepted Answer

A) hygroscopic. 
B) macroscopic. 
C) orthoscopic. 
D) symbiotic. 
A) hygroscopic. 
B) macroscopic. 
C) orthoscopic. 
D) symbiotic.

Question 7

How many liters of O2 gas at 25°C and 1.00 atm pressure are needed to react with 60.25 grams of potassium hydride according to the chemical equation shown below?
2 KH(s)+ O2(g)→ H2O(l)+ K2O(s)

Accepted Answer

A) 9)19 L 
B) 18.4 L 
C) 36.8 L 
D) 73.5 L 
A) 9)19 L 
B) 18.4 L 
C) 36.8 L 
D) 73.5 L

Question 8

A 7.63-gram sample of hydrated magnesium sulfate MgSO4∙ xH2O is heated until all of the water is driven off.If 3.72 grams of anhydrous MgSO4 is obtained,how many water molecules combine with each formula unit of magnesium sulfate in the hydrate?

Accepted Answer

A) 5 
B) 6 
C) 7 
D) 8 
A) 5 
B) 6 
C) 7 
D) 8

Question 9

How many liters of hydrogen gas can be generated by reacting 9.25 grams of barium hydride with water at 20°C and 755 mm Hg pressure according to the chemical equation shown below?
BaH2(s)+ 2 H2O(l)→ Ba(OH)2(aq)+ 2 H2(g)

Accepted Answer

A) 0)219 L 
B) 0)799 L 
C) 1)60 L 
D) 3)21 L 
A) 0)219 L 
B) 0)799 L 
C) 1)60 L 
D) 3)21 L

Question 10

If the molar mass of monoatomic deuterium (D)is 2.0141 grams then what is the density of diatomic deuterium (D2)gas at 25.0°C and 1.00 atmosphere pressure?

Accepted Answer

A) 0)082 g/L 
B) 0)165 g/L 
C) 0)329 g/L 
D) 12.2 g/L 
A) 0)082 g/L 
B) 0)165 g/L 
C) 0)329 g/L 
D) 12.2 g/L

Question 11

-Using the above models of hydrides,indicate the one most representative of an ionic hydride.

Accepted Answer

A) I 
B) II 
C) III 
D) IV 
A) I 
B) II 
C) III 
D) IV

Question 12

How many liters of oxygen gas can be produced at STP from the decomposition of 0.250 L of 3.00 M H2O2 in the reaction according to the chemical equation shown below?

Accepted Answer

A) 8)41 L 
B) 11.2 L 
C) 16.8 L 
D) 33.6 L 
A) 8)41 L 
B) 11.2 L 
C) 16.8 L 
D) 33.6 L

Question 13

In the preparation of oxygen by the thermal decomposition of potassium chlorate shown below,what is the oxidation number change of the atom undergoing reduction?
2 KClO3(s)→ 2 KCl(s)+ 3 O2(g)

Accepted Answer

A) - 8 
B) - 6 
C) + 1 
D) + 2 
A) - 8 
B) - 6 
C) + 1 
D) + 2

Question 14

How many liters of hydrogen gas are needed to produce 90.0 grams of water at 25.0°C and 1.00 atm pressure according to the chemical equation shown below?
2 H2(g)+ O2(g)→ 2 H2O(l)

Accepted Answer

A) 61.1 L 
B) 122 L 
C) 183 L 
D) 366 L 
A) 61.1 L 
B) 122 L 
C) 183 L 
D) 366 L

Question 15

How many liters of hydrogen gas are needed to produce 100.0 grams of water at 25.0°C and 1.00 atm pressure according to the chemical equation shown below?
2 H2(g)+ O2(g)→ 2 H2O(l)

Accepted Answer

A) 67.9 L 
B) 136 L 
C) 203 L 
D) 407 L 
A) 67.9 L 
B) 136 L 
C) 203 L 
D) 407 L

Question 16

Which is classified as an amphoteric binary oxide?

Accepted Answer

A) B2O3 
B) CO2 
C) Al2O3 
D) SiO2 
A) B2O3 
B) CO2 
C) Al2O3 
D) SiO2

Question 17

Which isotope of diatomic hydrogen should have the highest heat of vaporization?

Accepted Answer

A) H2 
B) D2 
C) T2 
D) The values are equal. 
A) H2 
B) D2 
C) T2 
D) The values are equal.

Question 18

How many grams of KCl(s)are produced from the thermal decomposition of KClO3(s)which produces 50.0 mL of O2(g)at 25°C and 1.00 atm pressure according to the chemical equation shown below?
2 KClO3(s)→ 2 KCl(s)+ 3 O2(g)

Accepted Answer

A) 0)102 g 
B) 0)152 g 
C) 0)167 g 
D) 0)304 g 
A) 0)102 g 
B) 0)152 g 
C) 0)167 g 
D) 0)304 g

Question 19

Look at the location of elements A,B,C,and D in the following periodic table.Consider the oxides that form when the elements A-D are in their highest oxidation states.  
-Which oxide is the most covalent?

Accepted Answer

A) A 
B) B 
C) C 
D) D 
A) A 
B) B 
C) C 
D) D

Question 20

Superoxide ion,O2-,peroxide ion,O22-,and oxide ion,O2-,contain ________,________,and ________ unpaired electrons,respectively.

Accepted Answer

Exam 18: Hydrogen, oxygen, and Water

Which one of the following compounds is a hydrate?

-Which element shown on the periodic table above forms a covalent binary hydride with the formula MX3?

-From the above models of hydrides,indicate the one most representative of an interstitial metallic hydride.

What is not a characteristic of ozone,O3?

Which has the greatest number of unpaired electrons?

Compounds that absorb water from the atmosphere are said to be

How many liters of O2 gas at 25°C and 1.00 atm pressure are needed to react with 60.25 grams of potassium hydride according to the chemical equation shown below? 2 KH(s)+ O2(g)→ H2O(l)+ K2O(s)

A 7.63-gram sample of hydrated magnesium sulfate MgSO4∙ xH2O is heated until all of the water is driven off.If 3.72 grams of anhydrous MgSO4 is obtained,how many water molecules combine with each formula unit of magnesium sulfate in the hydrate?

How many liters of hydrogen gas can be generated by reacting 9.25 grams of barium hydride with water at 20°C and 755 mm Hg pressure according to the chemical equation shown below? BaH2(s)+ 2 H2O(l)→ Ba(OH)2(aq)+ 2 H2(g)

If the molar mass of monoatomic deuterium (D)is 2.0141 grams then what is the density of diatomic deuterium (D2)gas at 25.0°C and 1.00 atmosphere pressure?

-Using the above models of hydrides,indicate the one most representative of an ionic hydride.

How many liters of oxygen gas can be produced at STP from the decomposition of 0.250 L of 3.00 M H2O2 in the reaction according to the chemical equation shown below?

In the preparation of oxygen by the thermal decomposition of potassium chlorate shown below,what is the oxidation number change of the atom undergoing reduction? 2 KClO3(s)→ 2 KCl(s)+ 3 O2(g)

How many liters of hydrogen gas are needed to produce 90.0 grams of water at 25.0°C and 1.00 atm pressure according to the chemical equation shown below? 2 H2(g)+ O2(g)→ 2 H2O(l)

How many liters of hydrogen gas are needed to produce 100.0 grams of water at 25.0°C and 1.00 atm pressure according to the chemical equation shown below? 2 H2(g)+ O2(g)→ 2 H2O(l)

Which is classified as an amphoteric binary oxide?

Which isotope of diatomic hydrogen should have the highest heat of vaporization?

How many grams of KCl(s)are produced from the thermal decomposition of KClO3(s)which produces 50.0 mL of O2(g)at 25°C and 1.00 atm pressure according to the chemical equation shown below? 2 KClO3(s)→ 2 KCl(s)+ 3 O2(g)

Look at the location of elements A,B,C,and D in the following periodic table.Consider the oxides that form when the elements A-D are in their highest oxidation states. -Which oxide is the most covalent?

Superoxide ion,O2-,peroxide ion,O22-,and oxide ion,O2-,contain ________,________,and ________ unpaired electrons,respectively.

Chemistry: Matter and Measurement

Atoms, molecules, and Ions

Formulas, equations, and Moles

Reactions in Aqueous Solutions

Periodicity and the Atomic Structure of Atoms

Ionic Bonds and Some Main-Group Chemistry

Covalent Bonds and Molecular Structure

Thermochemistry: Chemical Energy

Gases: Their Properties and Behavior

Liquids,solids,and Phase Changes

Solutions and Their Properties

Chemical Kinetics

Chemical Equilibrium

Aqueous Equilibria: Acids and Bases

Applications of Aqueous Equilibria

Thermodynamics: Entropy, free Energy, and Equilibrium

Electrochemistry

The Main-Group Elements

Transition Elements and Coordination Chemistry

Metals and Solid-State Materials

Nuclear Chemistry

Organic and Biological Chemistry

Filters

-Which element shown on the periodic table above forms a covalent binary hydride with the formula MX₃?

What is not a characteristic of ozone,O₃?

How many liters of O₂ gas at 25°C and 1.00 atm pressure are needed to react with 60.25 grams of potassium hydride according to the chemical equation shown below? 2 KH(s)+ O₂(g)→ H₂O(l)+ K₂O(s)

A 7.63-gram sample of hydrated magnesium sulfate MgSO₄∙ xH₂O is heated until all of the water is driven off.If 3.72 grams of anhydrous MgSO₄ is obtained,how many water molecules combine with each formula unit of magnesium sulfate in the hydrate?

How many liters of hydrogen gas can be generated by reacting 9.25 grams of barium hydride with water at 20°C and 755 mm Hg pressure according to the chemical equation shown below? BaH₂(s)+ 2 H₂O(l)→ Ba(OH)₂(aq)+ 2 H₂(g)

If the molar mass of monoatomic deuterium (D)is 2.0141 grams then what is the density of diatomic deuterium (D₂)gas at 25.0°C and 1.00 atmosphere pressure?

How many liters of oxygen gas can be produced at STP from the decomposition of 0.250 L of 3.00 M H₂O₂ in the reaction according to the chemical equation shown below?

In the preparation of oxygen by the thermal decomposition of potassium chlorate shown below,what is the oxidation number change of the atom undergoing reduction? 2 KClO₃(s)→ 2 KCl(s)+ 3 O₂(g)

How many liters of hydrogen gas are needed to produce 90.0 grams of water at 25.0°C and 1.00 atm pressure according to the chemical equation shown below? 2 H₂(g)+ O₂(g)→ 2 H₂O(l)

How many liters of hydrogen gas are needed to produce 100.0 grams of water at 25.0°C and 1.00 atm pressure according to the chemical equation shown below? 2 H₂(g)+ O₂(g)→ 2 H₂O(l)

How many grams of KCl(s)are produced from the thermal decomposition of KClO₃(s)which produces 50.0 mL of O₂(g)at 25°C and 1.00 atm pressure according to the chemical equation shown below? 2 KClO₃(s)→ 2 KCl(s)+ 3 O₂(g)

Superoxide ion,O₂^-,peroxide ion,O₂^2-,and oxide ion,O^2-,contain ,,and unpaired electrons,respectively.