Question 1

The first step in the steam-hydrocarbon re-forming process is shown below.
H2O(g) + CH4(g) → CO(g) + 3 H2(g
What is the change in oxidation number of the atom undergoing oxidation in this reaction?

Accepted Answer

A)  - 2
B)  + 1
C)  + 2
D)  + 6E) A) and B)
F) A) and C)

Question 2

At 25°C the dissociation constant Kw for T2O is 0.06 × 10-14.What is the molar concentration of OT- in 0.025 M TCl?

Accepted Answer

Question 3

An element that forms a basic oxide tends to form a hydride that is ________ (covalent,ionic).

Accepted Answer

The answer of An element that forms a basic oxide...

Question 4

A binary compound that forms when potassium reacts with oxygen has the composition 58.96% Na and 41.04% O.What is the formula of one formula unit of this compound?

Accepted Answer

A)  Na2O
B)  NaO
C)  NaO2
D)  Na2O2E) None of the above
F) All of the above

Question 5

Anhydrous magnesium sulfate can be used as a drying agent to remove moisture from the atmosphere.If the only product of this reaction is magnesium sulfate heptahydrate,how many grams of water can be removed by 0.500 kg of magnesium sulfate?

Accepted Answer

The answer of Anhydrous magnesium sulfate can be used as...

Question 6

When 0.500 grams of CuSO4 ∙ 5H2O is heated at a temperature of 300°C for twenty minutes it loses some water of hydration.If the resulting sample weighs 0.427 grams then what is the formula of the compound?

Accepted Answer

A)  CuSO4 ∙ H2O
B)  CuSO4∙ 2H2O
C)  CuSO4∙ 3H2O
D)  CuSO4∙ 4H2OE) B) and D)
F) All of the above

Question 7

A reaction occurs when 0.2105 g of CaH2 is dissolved in enough water to make 250 mL of solution.This solution will have a pH = ________.

Accepted Answer

Question 8

In the picture representing binary hydride AHx,lightly-shaded spheres represent H atoms or ions and darkly-shaded spheres represent atoms or ions of the other element,A.The oxidation state of hydrogen and the oxidation state of element A in the binary hydride shown below are x,lightly-shaded spheres represent H atoms or ions and darkly-shaded spheres represent atoms or ions of the other element,A.The oxidation state of hydrogen and the oxidation state of element A in the binary hydride shown below are   A) +1 and -3. B) +1 and -1. C) -1 and +1. D) -1 and +3." class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  +1 and -3.
B)  +1 and -1.
C)  -1 and +1.
D)  -1 and +3.E) None of the above
F) All of the above

Question 9

Indicate the order of reactivity of the halogens (F2,Cl2,Br2,I2) with water (fastest to slowest) .

Accepted Answer

A)  F2 > Cl2 > Br2 > I2
B)  Cl2 > Br2 > I2 > F2
C)  Br2 > I2 > F2 > Cl2
D)  I2 > Br2 > Cl2 > F2E) A) and B)
F) A) and C)

Question 10

Binary hydrides can be classified as covalent,ionic,or metallic.NaH,HCl,and NH3 are classified as ________,________,and ________ binary hydrides,respectively.

Accepted Answer

ionic,cova...

Question 11

Binary oxides can be classified as acidic,amphoteric,or basic.MgO,Al2O3,and SO3 are classified as ________,________,and ________ oxides,respectively.

Accepted Answer

basic,amph...

Question 12

How many grams of KCl(s) are produced from the thermal decomposition of KClO3(s) which produces 25.0 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) 0508 g
B)  0) 0762 g
C)  0) 0835 g
D)  0) 152 gE) A) and D)
F) None of the above

Question 13

What is the oxidation number of oxygen in KO2?

Accepted Answer

A)  0
B)  -1/2
C)  -1
D)  -2E) None of the above
F) B) and C)

Question 14

When 3.600 grams of anhydrous magnesium chloride were exposed to moist air,water was absorbed by the sample.If the resulting hydrated compound has a mass of 4.962 grams,what is the chemical formula of the hydrate?

Accepted Answer

A)  MgCl2∙ H2O
B)  MgCl2∙ 2H2O
C)  MgCl2∙ 3H2O
D)  MgCl2∙ 4H2OE) None of the above
F) A) and B)

Question 15

The preparation of oxygen by the thermal decomposition of potassium chlorate is shown below.
2 KClO3(s)  
2 KCl(s)+ 3 O2(g)
In this reaction the atom that is reduced is ________,which undergoes an oxidation number change from ________ to ________.

Accepted Answer

Question 16

Differences in the physical properties of H2O and D2O are due to isotope effects.Which comparison is not correct? Compared to H2O,D2O has a higher

Accepted Answer

A)  boiling point.
B)  density.
C)  dissociation constant.
D)  melting point.E) A) and D)
F) A) and C)

Question 17

The strongest homonuclear single bond is

Accepted Answer

A)  H-H
B)  C-C
C)  N-N
D)  O-OE) C) and D)
F) A) and B)

Question 18

What is the anhydrous form of nitric acid,HNO3?

Accepted Answer

A)  NO
B)  NO2
C)  N2O3
D)  N2O5E) A) and C)
F) All of the above

Question 19

Which is an ionic binary hydride?

Accepted Answer

A)  HCl
B)  KH
C)  both HCl and KH
D)  neither HCl nor KHE) A) and B)
F) A) and C)

Question 20

The strongest force that must be overcome in order to melt LiH,SiH4,H2S,and HF is ________,________,________,and ________,respectively.

Accepted Answer

ionic bonding,London...

Exam 18: Hydrogen, oxygen, and Water

Differences in the physical properties of H2O and D2O are due to isotope effects.Which comparison is not correct? Compared to H2O,D2O has a higher

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An element that forms a basic oxide tends to form a hydride that is ________ (covalent,ionic).

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How many grams of KCl(s) are produced from the thermal decomposition of KClO3(s) which produces 25.0 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)

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Binary hydrides can be classified as covalent,ionic,or metallic.NaH,HCl,and NH3 are classified as ________,________,and ________ binary hydrides,respectively.

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The strongest force that must be overcome in order to melt LiH,SiH4,H2S,and HF is ________,________,________,and ________,respectively.

Correct Answerverifiedionic bonding,London...View AnswerShow Answer

When 0.500 grams of CuSO4 ∙ 5H2O is heated at a temperature of 300°C for twenty minutes it loses some water of hydration.If the resulting sample weighs 0.427 grams then what is the formula of the compound?

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Indicate the order of reactivity of the halogens (F2,Cl2,Br2,I2) with water (fastest to slowest) .

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At 25°C the dissociation constant Kw for T2O is 0.06 × 10-14.What is the molar concentration of OT- in 0.025 M TCl?

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A binary compound that forms when potassium reacts with oxygen has the composition 58.96% Na and 41.04% O.What is the formula of one formula unit of this compound?

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The strongest homonuclear single bond is

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What is the oxidation number of oxygen in KO2?

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Which is an ionic binary hydride?

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When 3.600 grams of anhydrous magnesium chloride were exposed to moist air,water was absorbed by the sample.If the resulting hydrated compound has a mass of 4.962 grams,what is the chemical formula of the hydrate?

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Binary oxides can be classified as acidic,amphoteric,or basic.MgO,Al2O3,and SO3 are classified as ________,________,and ________ oxides,respectively.

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A reaction occurs when 0.2105 g of CaH2 is dissolved in enough water to make 250 mL of solution.This solution will have a pH = ________.

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The first step in the steam-hydrocarbon re-forming process is shown below. H2O(g) + CH4(g) → CO(g) + 3 H2(g What is the change in oxidation number of the atom undergoing oxidation in this reaction?

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The preparation of oxygen by the thermal decomposition of potassium chlorate is shown below. 2 KClO3(s) 2 KCl(s)+ 3 O2(g) In this reaction the atom that is reduced is ________,which undergoes an oxidation number change from ________ to ________.

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In the picture representing binary hydride AHx,lightly-shaded spheres represent H atoms or ions and darkly-shaded spheres represent atoms or ions of the other element,A.The oxidation state of hydrogen and the oxidation state of element A in the binary hydride shown below are

Correct AnswerverifiedShow Answer

Anhydrous magnesium sulfate can be used as a drying agent to remove moisture from the atmosphere.If the only product of this reaction is magnesium sulfate heptahydrate,how many grams of water can be removed by 0.500 kg of magnesium sulfate?

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What is the anhydrous form of nitric acid,HNO3?

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Differences in the physical properties of H₂O and D₂O are due to isotope effects.Which comparison is not correct? Compared to H₂O,D₂O has a higher

Correct Answer
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How many grams of KCl(s) are produced from the thermal decomposition of KClO₃(s) which produces 25.0 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)

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Binary hydrides can be classified as covalent,ionic,or metallic.NaH,HCl,and NH₃ are classified as ,,and binary hydrides,respectively.

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ionic,cova...
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The strongest force that must be overcome in order to melt LiH,SiH₄,H₂S,and HF is ,,,and ,respectively.

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ionic bonding,London...
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When 0.500 grams of CuSO₄ ∙ 5H₂O is heated at a temperature of 300°C for twenty minutes it loses some water of hydration.If the resulting sample weighs 0.427 grams then what is the formula of the compound?

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Indicate the order of reactivity of the halogens (F₂,Cl₂,Br₂,I₂) with water (fastest to slowest) .

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At 25°C the dissociation constant K_w for T₂O is 0.06 × 10^-14.What is the molar concentration of OT^- in 0.025 M TCl?

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What is the oxidation number of oxygen in KO₂?

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Binary oxides can be classified as acidic,amphoteric,or basic.MgO,Al₂O₃,and SO₃ are classified as ,,and oxides,respectively.

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basic,amph...
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A reaction occurs when 0.2105 g of CaH₂ is dissolved in enough water to make 250 mL of solution.This solution will have a pH = ________.

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The first step in the steam-hydrocarbon re-forming process is shown below. H₂O(g) + CH₄(g) → CO(g) + 3 H₂(g What is the change in oxidation number of the atom undergoing oxidation in this reaction?

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The preparation of oxygen by the thermal decomposition of potassium chlorate is shown below. 2 KClO₃(s) 2 KCl(s)+ 3 O₂(g) In this reaction the atom that is reduced is ,which undergoes an oxidation number change from to .

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In the picture representing binary hydride AH_x,lightly-shaded spheres represent H atoms or ions and darkly-shaded spheres represent atoms or ions of the other element,A.The oxidation state of hydrogen and the oxidation state of element A in the binary hydride shown below are

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What is the anhydrous form of nitric acid,HNO₃?

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