Question 1

-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)  IVE) B) and C)
F) A) and D) B

Question 2

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 LE) All of the above
F) None of the above

Question 3

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? 2O2 in the reaction according to the chemical equation shown below?   A) 8) 41 L B) 11.2 L C) 16.8 L D) 33.6 L" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  8) 41 L
B)  11.2 L
C)  16.8 L
D)  33.6 LE) All of the above
F) None of the above

Question 4

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 LE) A) and B)
F) A) and C)

Question 5

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 gE) All of the above
F) C) and D)

Question 6

Which one of the following compounds is a hydrate?

Accepted Answer

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

Question 7

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.E) None of the above
F) All of the above

Question 8

Which is classified as an amphoteric binary oxide?

Accepted Answer

A)  B2O3
B)  CO2
C)  Al2O3
D)  SiO2E) A) and C)
F) A) and D)

Question 9

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)  8E) C) and D)
F) A) and B)

Question 10

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 LE) A) and B)
F) A) and C)

Question 11

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.E) A) and B)
F) A) and C)

Question 12

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/LE) A) and B)
F) B) and C)

Question 13

3? A) element A B) element B C) element C D) element D" class="answers-bank-image d-inline" rel="preload" >
-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 DE) B) and C)
F) All of the above D

Question 14

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)  DE) A) and B)
F) A) and C)

Question 15

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)  + 2E) A) and B)
F) A) and C)

Question 16

Compounds that absorb water from the atmosphere are said to be

Accepted Answer

A)  hygroscopic.
B)  macroscopic.
C)  orthoscopic.
D)  symbiotic.E) None of the above
F) A) and D)

Question 17

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 LE) A) and C)
F) B) and D)

Question 18

Which has the greatest number of unpaired electrons?

Accepted Answer

A)  O2-
B)  O2
C)  O2-
D)  O22-E) None of the above
F) All of the above

Question 19

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

Accepted Answer

Question 20

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

Accepted Answer

A)  I
B)  II
C)  III
D)  IVE) C) and D)
F) None of the above

Exam 18: Hydrogen, oxygen, and Water

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

Correct AnswerverifiedB

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)

Correct AnswerverifiedShow Answer

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?

Correct AnswerverifiedShow Answer

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)

Correct AnswerverifiedShow Answer

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)

Correct AnswerverifiedShow Answer

Which one of the following compounds is a hydrate?

Correct AnswerverifiedC

What is not a characteristic of ozone,O3?

Correct AnswerverifiedShow Answer

Which is classified as an amphoteric binary oxide?

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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?

Correct AnswerverifiedShow Answer

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)

Correct AnswerverifiedShow Answer

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

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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?

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

Correct AnswerverifiedD

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?

Correct AnswerverifiedShow Answer

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)

Correct AnswerverifiedShow Answer

Compounds that absorb water from the atmosphere are said to be

Correct AnswerverifiedShow Answer

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)

Correct AnswerverifiedShow Answer

Which has the greatest number of unpaired electrons?

Correct AnswerverifiedShow Answer

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

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

Correct AnswerverifiedShow Answer

Correct Answer
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B

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)

Correct Answer
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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?

Correct Answer
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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)

Correct Answer
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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)

Correct Answer
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Correct Answer
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C

What is not a characteristic of ozone,O₃?

Correct Answer
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Correct Answer
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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?

Correct Answer
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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)

Correct Answer
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Correct Answer
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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?

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

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D

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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)

Correct Answer
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Correct Answer
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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)

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

Correct Answer
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Correct Answer
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