Question 1

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

Question 2

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

Question 3

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 4

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

Question 5

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 6

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) B) and C)
F) C) and D)

Question 7

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 8

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) A) and B)

Question 9

What is the anhydrous form of nitric acid,HNO3?

Accepted Answer

A)  NO
B)  NO2
C)  N2O3
D)  N2O5E) A) and B)
F) B) and C)

Question 10

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) B) and D)
F) A) and B)

Question 11

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 B)
F) All of the above

Question 12

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 13

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 14

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 C)
F) None of the above

Question 15

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) B) and C)

Question 16

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) All of the above
F) B) and C)

Question 17

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 18

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

Accepted Answer

ionic bonding,London...

Question 19

The strongest homonuclear single bond is

Accepted Answer

A)  H-H
B)  C-C
C)  N-N
D)  O-OE) All of the above
F) None of the above

Question 20

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...

Exam 18: Hydrogen, oxygen, and Water

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?

Correct AnswerverifiedShow Answer

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

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

Correct AnswerverifiedShow Answer

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

Correct Answerverifiedbasic,amph...View AnswerShow Answer

What is the anhydrous form of nitric acid,HNO3?

Correct AnswerverifiedShow Answer

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?

Correct AnswerverifiedShow Answer

The strongest homonuclear single bond is

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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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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 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?

Correct AnswerverifiedShow Answer

What is the oxidation number of oxygen in KO2?

Correct AnswerverifiedShow Answer

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 ________.

Correct AnswerverifiedShow Answer

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 = ________.

Correct AnswerverifiedShow Answer

Which is an ionic binary hydride?

Correct AnswerverifiedShow Answer

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

Correct Answerverifiedionic,cova...View AnswerShow Answer

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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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?

Correct AnswerverifiedShow Answer

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 AnswerverifiedShow Answer

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

Correct AnswerverifiedShow 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?

Correct AnswerverifiedShow Answer

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

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

Correct Answer
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basic,amph...
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What is the anhydrous form of nitric acid,HNO₃?

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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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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...
View Answer

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What is the oxidation number of oxygen in KO₂?

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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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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 = ________.

Correct Answer
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Correct Answer
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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.

Correct Answer
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ionic,cova...
View Answer

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

Correct Answer
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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?

Correct Answer
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