Question 1

Indicate the coefficient in front of H2O2 when the following redox equation is balanced in an acidic medium.
H2O2(aq)+ Cl-(aq)→ H2O(l)+ Cl2(aq)

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
A) 1 
B) 2 
C) 3 
D) 4

Question 2

In the following picture of an oxide,darkly-shaded spheres represent oxygen atoms or ions and lightly-shaded spheres represent atoms or ions of a third-row element in its highest oxidation state.Tell whether the oxide is covalent or ionic and whether the oxide is acidic or basic.

Accepted Answer

A) covalent and acidic 
B) covalent and basic 
C) ionic and acidic 
D) ionic and basic 
A) covalent and acidic 
B) covalent and basic 
C) ionic and acidic 
D) ionic and basic

Question 3

Consider the hypothetical isotope of hydrogen,quadrium,Q = 4H.Q2O would have a melting point that is (higher,lower)and a dissociation constant Kw that is (larger smaller)than H2O.

Accepted Answer

A) higher,larger 
B) higher,smaller 
C) lower,larger 
D) lower,smaller 
A) higher,larger 
B) higher,smaller 
C) lower,larger 
D) lower,smaller

Question 4

When 5.60 grams of anhydrous copper(II)sulfate is exposed to moist air,it absorbs water.If the hydrated copper compound has a mass of 8.13 grams,what is the chemical formula of the hydrate?

Accepted Answer

A) CuSO4∙ 2H2O 
B) CuSO4∙ 3H2O 
C) CuSO4∙ 4H2O 
D) CuSO4∙ 5H2O 
A) CuSO4∙ 2H2O 
B) CuSO4∙ 3H2O 
C) CuSO4∙ 4H2O 
D) CuSO4∙ 5H2O

Question 5

When all water is removed from a hydrate the resulting product is said to be

Accepted Answer

A) androgenous. 
B) anhydrous. 
C) arable. 
D) arid. 
A) androgenous. 
B) anhydrous. 
C) arable. 
D) arid.

Question 6

Using the three different isotopes of oxygen 16O,17O,18O and the major isotope of hydrogen,1H.Determine the number of different types of isotopically substituted hydrogen peroxide,H2O2,that could be formed.

Accepted Answer

A) 3 
B) 5 
C) 6 
D) 9 
A) 3 
B) 5 
C) 6 
D) 9

Question 7

There are three isotopes of oxygen 16O,17O and 18O.Indicate the number of different types of isotopically substituted diatomic oxygen.

Accepted Answer

A) 3 
B) 5 
C) 6 
D) 9 
A) 3 
B) 5 
C) 6 
D) 9

Question 8

Commercially oxygen is usually obtained by

Accepted Answer

A) decomposition of mercury(II)oxide. 
B) decomposition of potassium chlorate. 
C) electrolytic decomposition of water. 
D) fractional distillation of air. 
A) decomposition of mercury(II)oxide. 
B) decomposition of potassium chlorate. 
C) electrolytic decomposition of water. 
D) fractional distillation of air.

Question 9

What is the total volume of hydrogen gas and oxygen gas that can be produced from the thermal decomposition of 0.0425 grams of H2O2 at 700°C and 755 mm Hg according to the chemical equation shown below?
H2O2(l)→ H2(g)+ O2(g)

Accepted Answer

A) 50.2 mL 
B) 100 mL 
C) 151 mL 
D) 201 mL 
A) 50.2 mL 
B) 100 mL 
C) 151 mL 
D) 201 mL

Question 10

In the following pictures representing binary hydrides AHS1U1B1xS1U1B0,lightly-shaded spheres represent H atoms or ions and darkly-shaded spheres represent atoms or ions of the other element,A.  
-The binary hydride shown in picture (2)is classified as

Accepted Answer

A) covalent. 
B) interstitial (metallic). 
C) ionic. 
D) None of these 
A) covalent. 
B) interstitial (metallic). 
C) ionic. 
D) None of these

Question 11

What is the total volume of the mixture of hydrogen gas and oxygen gas can be obtained from the electrolysis of 110.0 grams of water at 25.0°C and 1.00 atm pressure according to the chemical equation shown below?
2 H2O(l)→ 2 H2(g)+ O2(g)

Accepted Answer

A) 74.7 L 
B) 149 L 
C) 224 L 
D) 447 L 
A) 74.7 L 
B) 149 L 
C) 224 L 
D) 447 L

Question 12

What is the total volume of the mixture of hydrogen gas and oxygen gas can be obtained from the electrolysis of 90.0 grams of water at 25.0°C and 1.00 atm pressure according to the chemical equation shown below?
2 H2O(l)  2 H2(g)+ O2(g)

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 13

What is the total volume of hydrogen gas and oxygen gas that can be produced from the thermal decomposition of 0.340 grams of H2O2 at 700°C and 755 mm Hg according to the chemical equation shown below?
H2O2(l)→ H2(g)+ O2(g)

Accepted Answer

A) 402 mL 
B) 804 mL 
C) 1210 mL 
D) 1610 mL 
A) 402 mL 
B) 804 mL 
C) 1210 mL 
D) 1610 mL

Question 14

Which is not true about elemental oxygen?

Accepted Answer

A) Oxygen exists in two allotropic forms. 
B) Oxygen has a double bond. 
C) Oxygen is a diamagnetic element. 
D) Solid oxygen is pale blue in color 
A) Oxygen exists in two allotropic forms. 
B) Oxygen has a double bond. 
C) Oxygen is a diamagnetic element. 
D) Solid oxygen is pale blue in color

Question 15

How many liters of hydrogen gas can be generated by reacting 6.25 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)148 L 
B) 0)540 L 
C) 1)08 L 
D) 2)17 L 
A) 0)148 L 
B) 0)540 L 
C) 1)08 L 
D) 2)17 L

Question 16

Which individual is generally given credit for the discovery of hydrogen gas?

Accepted Answer

A) Cavendish 
B) Davy 
C) Lavoisier 
D) Priestley 
A) Cavendish 
B) Davy 
C) Lavoisier 
D) Priestley

Question 17

What is the Lewis electron dot structure for the hydride ion?

Accepted Answer

A) H+ 
B) H: - 
C) H ∙ 
D) H3O+ 
A) H+ 
B) H: - 
C) H ∙ 
D) H3O+

Question 18

The oxide of which element,identified by letters A,B,C,and D in the following periodic table,is most acidic in its highest oxidation state?

Accepted Answer

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

Question 19

How many grams of zinc metal are required to produce 2.00 liters of hydrogen gas at STP according to the chemical equation shown below?
Zn(s)+ 2 HCl(aq)→ ZnCl2(aq)+ H2(g)

Accepted Answer

A) 0)171 g 
B) 5)83 g 
C) 11.7 g 
D) 131 g 
A) 0)171 g 
B) 5)83 g 
C) 11.7 g 
D) 131 g

Question 20

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 a solid with an infinitely extended three-dimensional crystal structure?

Accepted Answer

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

Exam 18: Hydrogen, oxygen, and Water

Indicate the coefficient in front of H2O2 when the following redox equation is balanced in an acidic medium. H2O2(aq)+ Cl-(aq)→ H2O(l)+ Cl2(aq)

In the following picture of an oxide,darkly-shaded spheres represent oxygen atoms or ions and lightly-shaded spheres represent atoms or ions of a third-row element in its highest oxidation state.Tell whether the oxide is covalent or ionic and whether the oxide is acidic or basic.

Consider the hypothetical isotope of hydrogen,quadrium,Q = 4H.Q2O would have a melting point that is (higher,lower)and a dissociation constant Kw that is (larger smaller)than H2O.

When 5.60 grams of anhydrous copper(II)sulfate is exposed to moist air,it absorbs water.If the hydrated copper compound has a mass of 8.13 grams,what is the chemical formula of the hydrate?

When all water is removed from a hydrate the resulting product is said to be

Using the three different isotopes of oxygen 16O,17O,18O and the major isotope of hydrogen,1H.Determine the number of different types of isotopically substituted hydrogen peroxide,H2O2,that could be formed.

There are three isotopes of oxygen 16O,17O and 18O.Indicate the number of different types of isotopically substituted diatomic oxygen.

Commercially oxygen is usually obtained by

What is the total volume of hydrogen gas and oxygen gas that can be produced from the thermal decomposition of 0.0425 grams of H2O2 at 700°C and 755 mm Hg according to the chemical equation shown below? H2O2(l)→ H2(g)+ O2(g)

In the following pictures representing binary hydrides AHx,lightly-shaded spheres represent H atoms or ions and darkly-shaded spheres represent atoms or ions of the other element,A. -The binary hydride shown in picture (2)is classified as

What is the total volume of the mixture of hydrogen gas and oxygen gas can be obtained from the electrolysis of 110.0 grams of water at 25.0°C and 1.00 atm pressure according to the chemical equation shown below? 2 H2O(l)→ 2 H2(g)+ O2(g)

What is the total volume of the mixture of hydrogen gas and oxygen gas can be obtained from the electrolysis of 90.0 grams of water at 25.0°C and 1.00 atm pressure according to the chemical equation shown below? 2 H2O(l) 2 H2(g)+ O2(g)

What is the total volume of hydrogen gas and oxygen gas that can be produced from the thermal decomposition of 0.340 grams of H2O2 at 700°C and 755 mm Hg according to the chemical equation shown below? H2O2(l)→ H2(g)+ O2(g)

Which is not true about elemental oxygen?

How many liters of hydrogen gas can be generated by reacting 6.25 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)

Which individual is generally given credit for the discovery of hydrogen gas?

What is the Lewis electron dot structure for the hydride ion?

The oxide of which element,identified by letters A,B,C,and D in the following periodic table,is most acidic in its highest oxidation state?

How many grams of zinc metal are required to produce 2.00 liters of hydrogen gas at STP according to the chemical equation shown below? Zn(s)+ 2 HCl(aq)→ ZnCl2(aq)+ H2(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 a solid with an infinitely extended three-dimensional crystal structure?

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

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Indicate the coefficient in front of H₂O₂ when the following redox equation is balanced in an acidic medium. H₂O₂(aq)+ Cl^-(aq)→ H₂O(l)+ Cl₂(aq)

Consider the hypothetical isotope of hydrogen,quadrium,Q = ⁴H.Q₂O would have a melting point that is (higher,lower)and a dissociation constant K_w that is (larger smaller)than H₂O.

Using the three different isotopes of oxygen ¹⁶O,¹⁷O,¹⁸O and the major isotope of hydrogen,¹H.Determine the number of different types of isotopically substituted hydrogen peroxide,H₂O₂,that could be formed.

There are three isotopes of oxygen ¹⁶O,¹⁷O and ¹⁸O.Indicate the number of different types of isotopically substituted diatomic oxygen.

What is the total volume of hydrogen gas and oxygen gas that can be produced from the thermal decomposition of 0.0425 grams of H₂O₂ at 700°C and 755 mm Hg according to the chemical equation shown below? H₂O₂(l)→ H₂(g)+ O₂(g)

In the following pictures representing binary hydrides AH_x,lightly-shaded spheres represent H atoms or ions and darkly-shaded spheres represent atoms or ions of the other element,A. -The binary hydride shown in picture (2)is classified as

What is the total volume of the mixture of hydrogen gas and oxygen gas can be obtained from the electrolysis of 110.0 grams of water at 25.0°C and 1.00 atm pressure according to the chemical equation shown below? 2 H₂O(l)→ 2 H₂(g)+ O₂(g)

What is the total volume of the mixture of hydrogen gas and oxygen gas can be obtained from the electrolysis of 90.0 grams of water at 25.0°C and 1.00 atm pressure according to the chemical equation shown below? 2 H₂O(l) 2 H₂(g)+ O₂(g)

What is the total volume of hydrogen gas and oxygen gas that can be produced from the thermal decomposition of 0.340 grams of H₂O₂ at 700°C and 755 mm Hg according to the chemical equation shown below? H₂O₂(l)→ H₂(g)+ O₂(g)

How many liters of hydrogen gas can be generated by reacting 6.25 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)

How many grams of zinc metal are required to produce 2.00 liters of hydrogen gas at STP according to the chemical equation shown below? Zn(s)+ 2 HCl(aq)→ ZnCl₂(aq)+ H₂(g)