Question 1

In which set are all compounds considered to be ionic binary hydrides?

Accepted Answer

A) NaH,KH,CaH2,BaH2 
B) MgH2,SrH2,AlH3,SiH4 
C) BeH2,B2H6,CH4,NH3 
D) MgH2,AlH3,SiH4,H2S 
A) NaH,KH,CaH2,BaH2 
B) MgH2,SrH2,AlH3,SiH4 
C) BeH2,B2H6,CH4,NH3 
D) MgH2,AlH3,SiH4,H2S

Question 2

How many grams of H2 gas gas can be produced by the reaction of 27.0 grams of Al(s)with an excess of dilute hydrochloric acid in the reaction shown below?
2 Al(s)+ 6 HCl(aq)→ 2 AlCl3(aq)+ 3 H2(g)

Accepted Answer

A) 1)34 g 
B) 2)02 g 
C) 3)03 g 
D) 6)06 g 
A) 1)34 g 
B) 2)02 g 
C) 3)03 g 
D) 6)06 g

Question 3

Which one of the following binary oxides is the most basic?

Accepted Answer

A) B2O3 
B) Al2O3 
C) Ga2O3 
D) In2O3 
A) B2O3 
B) Al2O3 
C) Ga2O3 
D) In2O3

Question 4

When sodium metal is heated in excess oxygen it tends to form ________.

Accepted Answer

A) an oxide 
B) a peroxide 
C) a superoxide 
D) an oxide and a superoxide 
A) an oxide 
B) a peroxide 
C) a superoxide 
D) an oxide and a superoxide

Question 5

How many grams of calcium hydride are required to produce 2.28 L of hydrogen gas at 25.0°C and 0.975 atm pressure according to the chemical equation shown below?
CaH2(s)+ 2 H2O(l)→ Ca(OH)2(aq)+ 2 H2(g)

Accepted Answer

A) 1)91 g 
B) 3)82 g 
C) 7)64 g 
D) 22.8 g 
A) 1)91 g 
B) 3)82 g 
C) 7)64 g 
D) 22.8 g

Question 6

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 has the highest melting point?

Accepted Answer

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

Question 7

-What group of elements is most likely to form covalent molecular hydrides?

Accepted Answer

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

Question 8

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 second-row element in its highest oxidation state.Identify the element represented by the lightly-shaded spheres.

Accepted Answer

A) C 
B) Mg 
C) N 
D) Na 
A) C 
B) Mg 
C) N 
D) Na

Question 9

What is not a characteristic of the aqueous chemical reactions of hydrogen peroxide?

Accepted Answer

A) It is a strong oxidizing agent. 
B) It is a reducing agent. 
C) It behaves as a weak base. 
D) It undergoes disproportionation. 
A) It is a strong oxidizing agent. 
B) It is a reducing agent. 
C) It behaves as a weak base. 
D) It undergoes disproportionation.

Question 10

Of O2,O2-,and O22-,the oxygen-oxygen bond length is expected to be longest in ________ and shortest in ________.

Accepted Answer

Question 11

In the following picture of an uncharged oxide,darkly-shaded spheres represent oxygen atoms or ions and lightly-shaded spheres represent atoms or ions of a second- or third-row element in its highest oxidation state.Identify the element represented by the lightly-shaded spheres.

Accepted Answer

A) Al 
B) C 
C) N 
D) S 
A) Al 
B) C 
C) N 
D) S

Question 12

There are three different isotopes of hydrogen 1H,2H,3H and three different isotopes of oxygen 16O,17O,18O.Indicate the number of different types of isotopically substituted water,H2O,that could be formed.

Accepted Answer

A) 9 
B) 12 
C) 15 
D) 18 
A) 9 
B) 12 
C) 15 
D) 18

Question 13

Write a chemical equation representing the water gas shift reaction.

Accepted Answer

A) H2O(g)+ CH4(g)→ CO(g)+ 3 H2(g) 
B) 2 H2O(l)→ 2 H2(g)+ O2(g) 
C) CO(g)+ H2O(g)→ CO2(g)+ H2(g) 
D) 4 H2O(g)+ 3 Fe → Fe3O4(s)+ 4 H2(g) 
A) H2O(g)+ CH4(g)→ CO(g)+ 3 H2(g) 
B) 2 H2O(l)→ 2 H2(g)+ O2(g) 
C) CO(g)+ H2O(g)→ CO2(g)+ H2(g) 
D) 4 H2O(g)+ 3 Fe → Fe3O4(s)+ 4 H2(g)

Question 14

An example of an isotope effect is the difference in the dissociation of D2O compared to H2O,as shown below.
H2O(l)⇌ H+(aq)+ OH-(aq)K =1.0 × 10-14
T2O(l)⇌ T+(aq)+ OT-(aq)K =6.0 × 10-16
A neutral H2O solution has a pH = ________,whereas a neutral T2O solution has a pH = pD = ________.

Accepted Answer

Question 15

How many grams of zinc metal are required to produce 1.00 liter of hydrogen gas at STP according to the chemical equation shown below?

Accepted Answer

A) 0)0343 g 
B) 2)92 g 
C) 5)84 g 
D) 65.4 g 
A) 0)0343 g 
B) 2)92 g 
C) 5)84 g 
D) 65.4 g

Question 16

What are the allotropes of oxygen?

Accepted Answer

A) O and O2 
B) O2 and O3 
C) O,O2 and O3 
D) O2,O3 and O4 
A) O and O2 
B) O2 and O3 
C) O,O2 and O3 
D) O2,O3 and O4

Question 17

Water accounts for approximately two-thirds of the mass of the adult human body.If an adult human has a mass of 145 pounds,how many water molecules are there in the adult human's body?

Accepted Answer

A) 96.7 molecules 
B) 2)43 × 103 molecules 
C) 1)47 × 1027 molecules 
D) 2)20 × 1027 molecules 
A) 96.7 molecules 
B) 2)43 × 103 molecules 
C) 1)47 × 1027 molecules 
D) 2)20 × 1027 molecules

Question 18

How many grams of calcium hydride are required to produce 4.56 L of hydrogen gas at 25.0°C and 0.975 atm pressure according to the chemical equation shown below?
CaH2(s)+ 2 H2O(l)→ Ca(OH)2(aq)+ 2 H2(g)

Accepted Answer

A) 3)82 g 
B) 7)64 g 
C) 15.3 g 
D) 45.6 g 
A) 3)82 g 
B) 7)64 g 
C) 15.3 g 
D) 45.6 g

Question 19

Which is not an isotope of hydrogen?

Accepted Answer

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

Question 20

When 0.350 grams of anhydrous copper(II)sulfate is exposed to moist air,it absorbs water.If the hydrated copper compound has a mass of 0.508 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

Exam 18: Hydrogen, oxygen, and Water

In which set are all compounds considered to be ionic binary hydrides?

How many grams of H2 gas gas can be produced by the reaction of 27.0 grams of Al(s)with an excess of dilute hydrochloric acid in the reaction shown below? 2 Al(s)+ 6 HCl(aq)→ 2 AlCl3(aq)+ 3 H2(g)

Which one of the following binary oxides is the most basic?

When sodium metal is heated in excess oxygen it tends to form ________.

How many grams of calcium hydride are required to produce 2.28 L of hydrogen gas at 25.0°C and 0.975 atm pressure according to the chemical equation shown below? CaH2(s)+ 2 H2O(l)→ Ca(OH)2(aq)+ 2 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 has the highest melting point?

-What group of elements is most likely to form covalent molecular hydrides?

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 second-row element in its highest oxidation state.Identify the element represented by the lightly-shaded spheres.

What is not a characteristic of the aqueous chemical reactions of hydrogen peroxide?

Of O2,O2-,and O22-,the oxygen-oxygen bond length is expected to be longest in ________ and shortest in ________.

In the following picture of an uncharged oxide,darkly-shaded spheres represent oxygen atoms or ions and lightly-shaded spheres represent atoms or ions of a second- or third-row element in its highest oxidation state.Identify the element represented by the lightly-shaded spheres.

There are three different isotopes of hydrogen 1H,2H,3H and three different isotopes of oxygen 16O,17O,18O.Indicate the number of different types of isotopically substituted water,H2O,that could be formed.

Write a chemical equation representing the water gas shift reaction.

An example of an isotope effect is the difference in the dissociation of D2O compared to H2O,as shown below. H2O(l)⇌ H+(aq)+ OH-(aq)K =1.0 × 10-14 T2O(l)⇌ T+(aq)+ OT-(aq)K =6.0 × 10-16 A neutral H2O solution has a pH = ________,whereas a neutral T2O solution has a pH = pD = ________.

How many grams of zinc metal are required to produce 1.00 liter of hydrogen gas at STP according to the chemical equation shown below?

What are the allotropes of oxygen?

Water accounts for approximately two-thirds of the mass of the adult human body.If an adult human has a mass of 145 pounds,how many water molecules are there in the adult human's body?

How many grams of calcium hydride are required to produce 4.56 L of hydrogen gas at 25.0°C and 0.975 atm pressure according to the chemical equation shown below? CaH2(s)+ 2 H2O(l)→ Ca(OH)2(aq)+ 2 H2(g)

Which is not an isotope of hydrogen?

When 0.350 grams of anhydrous copper(II)sulfate is exposed to moist air,it absorbs water.If the hydrated copper compound has a mass of 0.508 grams,what is the chemical formula of the hydrate?

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

How many grams of H₂ gas gas can be produced by the reaction of 27.0 grams of Al(s)with an excess of dilute hydrochloric acid in the reaction shown below? 2 Al(s)+ 6 HCl(aq)→ 2 AlCl₃(aq)+ 3 H₂(g)

How many grams of calcium hydride are required to produce 2.28 L of hydrogen gas at 25.0°C and 0.975 atm pressure according to the chemical equation shown below? CaH₂(s)+ 2 H₂O(l)→ Ca(OH)₂(aq)+ 2 H₂(g)

Of O₂,O₂^-,and O₂^2-,the oxygen-oxygen bond length is expected to be longest in and shortest in .

There are three different isotopes of hydrogen ¹H,²H,³H and three different isotopes of oxygen ¹⁶O,¹⁷O,¹⁸O.Indicate the number of different types of isotopically substituted water,H₂O,that could be formed.

An example of an isotope effect is the difference in the dissociation of D₂O compared to H₂O,as shown below. H₂O(l)⇌ H⁺(aq)+ OH^-(aq)K =1.0 × 10^-14 T₂O(l)⇌ T⁺(aq)+ OT^-(aq)K =6.0 × 10^-16 A neutral H₂O solution has a pH = ,whereas a neutral T₂O solution has a pH = pD = .

How many grams of calcium hydride are required to produce 4.56 L of hydrogen gas at 25.0°C and 0.975 atm pressure according to the chemical equation shown below? CaH₂(s)+ 2 H₂O(l)→ Ca(OH)₂(aq)+ 2 H₂(g)