Question 1

In the following reaction
2KNO3(s)+ 4C(s)$\rightarrow$K2CO3(s)+ 3CO(g)+ N2(g)
The reducing agent is

Accepted Answer

A)  CO(g). 
B)  KNO3(s). 
C)  K2CO3(s). 
D)  C(s). 
E)  N2(g). 
A)  CO(g). 
B)  KNO3(s). 
C)  K2CO3(s). 
D)  C(s). 
E)  N2(g).

Question 2

Consider the unbalanced reactions
Na(s)+ P4(s)$\rightarrow$ A
A + H2O(l)$\rightarrow$ B + C
Write the formulas of A,B,and C.

Accepted Answer

A = Na₃P(s)

Question 3

When phosphoric acid and potassium bromide are mixed, a product is

Accepted Answer

A)  HBrO(g). 
B)  HBr(g). 
C)  PBr2(g). 
D)  Br2(g). 
E)  P4(s). 
A)  HBrO(g). 
B)  HBr(g). 
C)  PBr2(g). 
D)  Br2(g). 
E)  P4(s).

Question 4

Write an equation for the second ionization energy of magnesium.

Accepted Answer

The answer of Write an equation for the second ionization...

Question 5

Which of the following pairs are allotropes?

Accepted Answer

A)  S8(s) and H2S(g) 
B)  S(s) and SO2(g) 
C)  O2(g) and H2O2(l) 
D)  C(s) and CO2(g) 
E)  O2(g) and O3(g) 
A)  S8(s) and H2S(g) 
B)  S(s) and SO2(g) 
C)  O2(g) and H2O2(l) 
D)  C(s) and CO2(g) 
E)  O2(g) and O3(g)

Question 6

Of the following, which compound(s)Exist?

Accepted Answer

A)  NCl3 
B)  PCl5 
C)  PCl3 
D)  NCl5 
E)  A through C exist. 
A)  NCl3 
B)  PCl5 
C)  PCl3 
D)  NCl5 
E)  A through C exist.

Question 7

Nitrogen triiodide can be prepared as the ammoniate, NI3·NH3.This compound is explosive when dry and decomposes according to the reaction below.
2NI3·NH3 $\rightarrow$ N2 + 2NH3 + 3I2
In this reaction,Nitrogen undergoes a change in oxidation number from

Accepted Answer

A)  +3 to 0. 
B)  +3 to -3. 
C)  There is no change in oxidation number occurs because this is not a redox reaction. 
D)  +6 to 0. 
E)  +1 to 0. 
A)  +3 to 0. 
B)  +3 to -3. 
C)  There is no change in oxidation number occurs because this is not a redox reaction. 
D)  +6 to 0. 
E)  +1 to 0.

Question 8

In the Ostwald process, the total change in oxidation number of nitrogen from reactant to nitric acid is

Accepted Answer

A)  5. 
B)  3. 
C)  6. 
D)  8. 
E)  7. 
A)  5. 
B)  3. 
C)  6. 
D)  8. 
E)  7.

Question 9

Sodium borohydride is produced from the reaction of

Accepted Answer

A)  B(OH)3(aq) and BCl3(l). 
B)  NaH(s) and B(s). 
C)  NaH(s) and B2O3(s). 
D)  NaH(s) and B(OH)3(aq). 
E)  NaH(s) and BCl3(l). 
A)  B(OH)3(aq) and BCl3(l). 
B)  NaH(s) and B(s). 
C)  NaH(s) and B2O3(s). 
D)  NaH(s) and B(OH)3(aq). 
E)  NaH(s) and BCl3(l).

Question 10

The formula of diborane is

Accepted Answer

A)  BH3.  
B)  B2H6.  
C)  B2H4.  
D)  B2H2.  
E)  B2H. 
A)  BH3.  
B)  B2H6.  
C)  B2H4.  
D)  B2H2.  
E)  B2H.

Question 11

Because the sulfur atom in SF6 has an oxidation number of +6,SF6 is a good oxidizing agent.

Accepted Answer

A) True 
 B)False

Question 12

What is the shape of sulfur dichloride?

Accepted Answer

A)  Bent (~109o) 
B)  Linear 
C)  Bent (~120o) 
D)  Trigonal pyramidal 
E)  Tetrahedral 
A)  Bent (~109o) 
B)  Linear 
C)  Bent (~120o) 
D)  Trigonal pyramidal 
E)  Tetrahedral

Question 13

When XeF4 acts as a fluorinating agent,

Accepted Answer

A)  F2 is produced. 
B)  XeF4 disproportionates. 
C)  XeF3+ is produced and is the reactive species. 
D)  Xe is reduced. 
E)  Xe is oxidized. 
A)  F2 is produced. 
B)  XeF4 disproportionates. 
C)  XeF3+ is produced and is the reactive species. 
D)  Xe is reduced. 
E)  Xe is oxidized.

Question 14

The equation that corresponds to the KS1U1B1aS1U1B0 for boric acid is

Accepted Answer

A)  B4O5(OH)42sup>-(aq) + 5H2O(l) b 4H3BO3(aq) + 2OHsup>-(aq). 
B)  H3BO3(aq) + H2O(l) b HB(OH)3+(aq) + OH-(aq). 
C)  (OH)3BOH2(aq) + H2O(l) b B(OH)4-(aq) + H3O+(aq). 
D)  B(OH)4-(aq) + H+(aq) b B(OH)3(aq) + H2O(l). 
E)  B4O72-(aq) + H2O(l) b B4O8H3-(aq) + H+(aq). 
A)  B4O5(OH)42sup>-(aq) + 5H2O(l) b 4H3BO3(aq) + 2OHsup>-(aq). 
B)  H3BO3(aq) + H2O(l) b HB(OH)3+(aq) + OH-(aq). 
C)  (OH)3BOH2(aq) + H2O(l) b B(OH)4-(aq) + H3O+(aq). 
D)  B(OH)4-(aq) + H+(aq) b B(OH)3(aq) + H2O(l). 
E)  B4O72-(aq) + H2O(l) b B4O8H3-(aq) + H+(aq).

Question 15

Which is the correct formula for anhydrous Epsom salts?

Accepted Answer

A)  Mg(OH)2  
B)  MgCl2  
C)  CaSO4  
D)  CaCl2  
E)  None of the above. 
A)  Mg(OH)2  
B)  MgCl2  
C)  CaSO4  
D)  CaCl2  
E)  None of the above.

Question 16

Which of the following is an interstitial carbide?

Accepted Answer

A)  SrC2  
B)  Al4C3  
C)  CaC2  
D)  K2C2  
E)  W2C 
A)  SrC2  
B)  Al4C3  
C)  CaC2  
D)  K2C2  
E)  W2C

Question 17

Write an equation for the first ionization energy of sodium.

Accepted Answer

Na(g)@#LAT-DLM& Na<s

Question 18

Which of the following oxides is amphoteric?

Accepted Answer

A)  NO2  
B)  Sb2O3  
C)  Bi2O3  
D)  As4O6  
E)  P2O5  
A)  NO2  
B)  Sb2O3  
C)  Bi2O3  
D)  As4O6  
E)  P2O5

Question 19

Which of the substances below can be used to extinguish a magnesium fire?

Accepted Answer

A)  Sand 
B)  Carbon dioxide 
C)  Nitrogen 
D)  All of the substances listed react with burning magnesium. 
E)  Water 
A)  Sand 
B)  Carbon dioxide 
C)  Nitrogen 
D)  All of the substances listed react with burning magnesium. 
E)  Water

Question 20

Which of the following is(are) true of sulfuric acid?

Accepted Answer

A)  Sulfuric acid is an oxidizing agent. 
B)  Sulfuric acid is a strong dehydrating agent. 
C)  Sulfuric acid is a strong Brønsted acid. 
D)  B, C, and D are all properties of sulfuric acid. 
A)  Sulfuric acid is an oxidizing agent. 
B)  Sulfuric acid is a strong dehydrating agent. 
C)  Sulfuric acid is a strong Brønsted acid. 
D)  B, C, and D are all properties of sulfuric acid.

In the following reaction 2KNO₃(s)+ 4C(s) $\rightarrow$ K₂CO₃(s)+ 3CO(g)+ N₂(g) The reducing agent is

Consider the unbalanced reactions Na(s)+ P₄(s) $\rightarrow$ A A + H₂O(l) $\rightarrow$ B + C Write the formulas of A,B,and C.

When phosphoric acid and potassium bromide are mixed, a product is

Write an equation for the second ionization energy of magnesium.

Which of the following pairs are allotropes?

Of the following, which compound(s)Exist?

Nitrogen triiodide can be prepared as the ammoniate, NI₃·NH₃.This compound is explosive when dry and decomposes according to the reaction below. 2NI₃·NH₃ $\rightarrow$ N₂ + 2NH₃ + 3I₂ In this reaction,Nitrogen undergoes a change in oxidation number from

In the Ostwald process, the total change in oxidation number of nitrogen from reactant to nitric acid is

Sodium borohydride is produced from the reaction of

The formula of diborane is

Because the sulfur atom in SF₆ has an oxidation number of +6,SF₆ is a good oxidizing agent.

What is the shape of sulfur dichloride?

When XeF₄ acts as a fluorinating agent,

The equation that corresponds to the K_a for boric acid is

Which is the correct formula for anhydrous Epsom salts?

Which of the following is an interstitial carbide?

Write an equation for the first ionization energy of sodium.

Which of the following oxides is amphoteric?

Which of the substances below can be used to extinguish a magnesium fire?

Which of the following is(are) true of sulfuric acid?

Atoms

Molecules

States of Matter

Thermodynamics

Equilibrium

Reactions

Kinetics

The D-Block Elements

Nuclear Chemistry

Organic Chemistry

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Exam 8: The Main-Group Elements

In the following reaction 2KNO3(s)+ 4C(s) →\rightarrow→ K2CO3(s)+ 3CO(g)+ N2(g) The reducing agent is

Consider the unbalanced reactions Na(s)+ P4(s) →\rightarrow→ A A + H2O(l) →\rightarrow→ B + C Write the formulas of A,B,and C.

When phosphoric acid and potassium bromide are mixed, a product is

Write an equation for the second ionization energy of magnesium.

Which of the following pairs are allotropes?

Of the following, which compound(s)Exist?

Nitrogen triiodide can be prepared as the ammoniate, NI3·NH3.This compound is explosive when dry and decomposes according to the reaction below. 2NI3·NH3 →\rightarrow→ N2 + 2NH3 + 3I2 In this reaction,Nitrogen undergoes a change in oxidation number from

In the Ostwald process, the total change in oxidation number of nitrogen from reactant to nitric acid is

Sodium borohydride is produced from the reaction of

The formula of diborane is

Because the sulfur atom in SF6 has an oxidation number of +6,SF6 is a good oxidizing agent.

What is the shape of sulfur dichloride?

When XeF4 acts as a fluorinating agent,

The equation that corresponds to the Ka for boric acid is

Which is the correct formula for anhydrous Epsom salts?

Which of the following is an interstitial carbide?

Write an equation for the first ionization energy of sodium.

Which of the following oxides is amphoteric?

Which of the substances below can be used to extinguish a magnesium fire?

Which of the following is(are) true of sulfuric acid?

Atoms

Molecules

States of Matter

Thermodynamics

Equilibrium

Reactions

Kinetics

The D-Block Elements

Nuclear Chemistry

Organic Chemistry

Filters

In the following reaction 2KNO₃(s)+ 4C(s) $\rightarrow$ K₂CO₃(s)+ 3CO(g)+ N₂(g) The reducing agent is

Consider the unbalanced reactions Na(s)+ P₄(s) $\rightarrow$ A A + H₂O(l) $\rightarrow$ B + C Write the formulas of A,B,and C.

Nitrogen triiodide can be prepared as the ammoniate, NI₃·NH₃.This compound is explosive when dry and decomposes according to the reaction below. 2NI₃·NH₃ $\rightarrow$ N₂ + 2NH₃ + 3I₂ In this reaction,Nitrogen undergoes a change in oxidation number from

Because the sulfur atom in SF₆ has an oxidation number of +6,SF₆ is a good oxidizing agent.

When XeF₄ acts as a fluorinating agent,

The equation that corresponds to the K_a for boric acid is