Question 1

What are the required coefficients to properly balance the following chemical reaction? 
H2(g) + Cl2(g) → HCl(g)

Accepted Answer

A)  1, 1, 2
B)  2, 2, 2(g) + Cl2(g) → HCl(g)   
A)  1, 1, 2 
B)  2, 2,   
C)  1, 1, 1 
D)  2, 1, 2 
E)  1, 2, 1" class="answers-bank-image d-inline" rel="preload" >
C)  1, 1, 1
D)  2, 1, 2
E)  1, 2, 1F) A) and B)
G) B) and E)

Question 2

Determine the oxidation state of P in PO33-.

Accepted Answer

A)  +3
B)  +6
C)  +2
D)  0
E)  -3F) D) and E)
G) B) and D)

Question 3

Determine the oxidizing agent in the following reaction. 
Ni(s) + 2AgClO4(aq) → Ni(ClO4) 2(aq) + 2Ag(s)

Accepted Answer

A)  Ag
B)  Ni
C)  Cl
D)  O
E)  This is not an oxidation-reduction reaction.F) C) and D)
G) B) and E)

Question 4

Determine the number of grams H2 formed when 250.0 mL of 0.743 mol L-1 HCl solution reacts with 3.41 × 1023 atoms of Fe according to the following reaction: 2HCl(aq) + Fe(s) → H2(g) + FeCl2(aq)

Accepted Answer

A)  0.374 g
B)  1.33 g
C)  1.14 g
D)  0.187 g
E)  1.51 gF) C) and D)
G) A) and E)

Question 5

What are the required coefficients to properly balance the following chemical reaction?
 PbS(s) + HBr(aq) → PbBr2(s) + H2S(g)

Accepted Answer

A)  1, 1, 2, 2
B)  1, 2, 1, 1
C)  1, 2, 2, 1
D)  2, 1, 1, 1
E)  2, 2, 1, 2F) A) and D)
G) A) and C)

Question 6

Which of the following compounds is an Arrhenius base?

Accepted Answer

A)  CH3OH
B)  CH3CO2H
C)  HOCl
D)  CsOHE) B) and C)
F) All of the above

Question 7

If 294 grams of FeS2 is allowed to react with 176 grams of O2 according to the following unbalanced equation, how many grams of Fe2O3 are produced?
FeS2 + O2 → Fe2O3 + SO2

Accepted Answer

Question 8

Choose the statement below that is TRUE.

Accepted Answer

A)  A weak acid solution consists of mostly nonionized acid molecules.
B)  The term "strong electrolyte" means that the substance is extremely reactive.
C)  A strong acid solution consists of only partially ionized acid molecules.
D)  The term "weak electrolyte" means that the substance is inert.
E)  A molecular compound that does not ionize in solution is considered a strong electrolyte.F) A) and B)
G) A) and C)

Question 9

According to the following reaction, how many grams of sulfur are formed when 37.4 g of water are formed? 2H2S(g) + SO2(g) → 3S(s) + 2H2O(l)

Accepted Answer

A)  99.8 g S
B)  66.6 g S
C)  56.1 g S
D)  44.4 g S
E)  14.0 g SF) None of the above
G) B) and C)

Question 10

What are the required coefficients to properly balance the following chemical reaction?
 Cu(s) + S(s) → Cu2S(s)

Accepted Answer

A)  1, 1, 2S(s)  
A)  1, 1,   
B)  1, 1, 1 
C)  1, 1, 2 
D)  2, 1, 1 
E)  2, 1, 2" class="answers-bank-image d-inline" rel="preload" >
B)  1, 1, 1
C)  1, 1, 2
D)  2, 1, 1
E)  2, 1, 2F) C) and D)
G) A) and D)

Exam 4: Chemical Reactions and Stoichiometry

Determine the number of grams H₂ formed when 250.0 mL of 0.743 mol L^-1 HCl solution reacts with 3.41 × 10²³ atoms of Fe according to the following reaction: 2HCl(aq) + Fe(s) → H₂(g) + FeCl₂(aq)

Correct Answer
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What are the required coefficients to properly balance the following chemical reaction? H₂(g) + Cl₂(g) → HCl(g)

Correct Answer
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If 294 grams of FeS₂ is allowed to react with 176 grams of O₂ according to the following unbalanced equation, how many grams of Fe₂O₃ are produced? FeS₂ + O₂ → Fe₂O₃ + SO₂

Correct Answer
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Determine the oxidizing agent in the following reaction. Ni(s) + 2AgClO₄(aq) → Ni(ClO₄) ₂(aq) + 2Ag(s)

Correct Answer
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What are the required coefficients to properly balance the following chemical reaction? Cu(s) + S(s) → Cu₂S(s)

Correct Answer
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Determine the oxidation state of P in PO₃^3-.

Correct Answer
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Choose the statement below that is TRUE.

Correct Answer
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What are the required coefficients to properly balance the following chemical reaction? PbS(s) + HBr(aq) → PbBr₂(s) + H₂S(g)

Correct Answer
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According to the following reaction, how many grams of sulfur are formed when 37.4 g of water are formed? 2H₂S(g) + SO₂(g) → 3S(s) + 2H₂O(l)

Correct Answer
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Which of the following compounds is an Arrhenius base?

Correct Answer
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Exam 4: Chemical Reactions and Stoichiometry

Determine the number of grams H2 formed when 250.0 mL of 0.743 mol L-1 HCl solution reacts with 3.41 × 1023 atoms of Fe according to the following reaction: 2HCl(aq) + Fe(s) → H2(g) + FeCl2(aq)

Correct AnswerverifiedShow Answer

What are the required coefficients to properly balance the following chemical reaction? H2(g) + Cl2(g) → HCl(g)

Correct AnswerverifiedShow Answer

If 294 grams of FeS2 is allowed to react with 176 grams of O2 according to the following unbalanced equation, how many grams of Fe2O3 are produced? FeS2 + O2 → Fe2O3 + SO2

Correct AnswerverifiedShow Answer

Determine the oxidizing agent in the following reaction. Ni(s) + 2AgClO4(aq) → Ni(ClO4) 2(aq) + 2Ag(s)

Correct AnswerverifiedShow Answer

What are the required coefficients to properly balance the following chemical reaction? Cu(s) + S(s) → Cu2S(s)

Correct AnswerverifiedShow Answer

Determine the oxidation state of P in PO33-.

Correct AnswerverifiedShow Answer

Choose the statement below that is TRUE.

Correct AnswerverifiedShow Answer

What are the required coefficients to properly balance the following chemical reaction? PbS(s) + HBr(aq) → PbBr2(s) + H2S(g)

Correct AnswerverifiedShow Answer

According to the following reaction, how many grams of sulfur are formed when 37.4 g of water are formed? 2H2S(g) + SO2(g) → 3S(s) + 2H2O(l)

Correct AnswerverifiedShow Answer

Which of the following compounds is an Arrhenius base?

Correct AnswerverifiedShow Answer

Determine the number of grams H₂ formed when 250.0 mL of 0.743 mol L^-1 HCl solution reacts with 3.41 × 10²³ atoms of Fe according to the following reaction: 2HCl(aq) + Fe(s) → H₂(g) + FeCl₂(aq)

Correct Answer
verified

What are the required coefficients to properly balance the following chemical reaction? H₂(g) + Cl₂(g) → HCl(g)

Correct Answer
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If 294 grams of FeS₂ is allowed to react with 176 grams of O₂ according to the following unbalanced equation, how many grams of Fe₂O₃ are produced? FeS₂ + O₂ → Fe₂O₃ + SO₂

Correct Answer
verified

Determine the oxidizing agent in the following reaction. Ni(s) + 2AgClO₄(aq) → Ni(ClO₄) ₂(aq) + 2Ag(s)

Correct Answer
verified

What are the required coefficients to properly balance the following chemical reaction? Cu(s) + S(s) → Cu₂S(s)

Correct Answer
verified

Determine the oxidation state of P in PO₃^3-.

Correct Answer
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Correct Answer
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What are the required coefficients to properly balance the following chemical reaction? PbS(s) + HBr(aq) → PbBr₂(s) + H₂S(g)

Correct Answer
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According to the following reaction, how many grams of sulfur are formed when 37.4 g of water are formed? 2H₂S(g) + SO₂(g) → 3S(s) + 2H₂O(l)

Correct Answer
verified

Correct Answer
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