Question 1

How many atoms of oxygen are in 1.00 mol of sulfur dioxide,SO2?

Accepted Answer

A)   64.1
B)   64.1 × 6.02 × 1023
C)   12.0 × 1023
D)   6.02 × 1023

Question 2

In the reaction 2Al + 3F2→ 2AlF3,the aluminum

Accepted Answer

A)   is reduced.
B)   gains electrons.
C)   is oxidized.
D)   is the catalyst.

Question 3

A neutral aqueous solution has a pH of ______________.

Accepted Answer

The answer of A neutral aqueous solution has a pH...

Question 4

In general,fast reactions

Accepted Answer

A)   are exothermic.
B)   are endothermic.
C)   have low activation energies.
D)   have high activation energies.

Question 5

An acid added to a base will produce a

Accepted Answer

A)   salt and hydrogen ions.
B)   salt and hydroxide ions.
C)   salt and water.
D)   stronger acid and base.

Question 6

When aqueous solutions of Na2CO3 and BaCl2 are mixed,the products are NaCl and ______________.

Accepted Answer

Question 7

Increased temperature usually leads to an increase in reaction rate because collisions are

Accepted Answer

A)   more violent only.
B)   more frequent only.
C)   both more violent and more frequent.
D)   none of these

Question 8

The equation H2O2 → H2O + O is not correctly written because

Accepted Answer

A)   the number of atoms of each element on each side is not the same.
B)   the mass indicated on each side is not the same.
C)   oxygen is diatomic.
D)   hydrogen peroxide decomposes to H2O and H.

Question 9

Which of the following compounds would not precipitate from an aqueous solution during a double-replacement reaction?

Accepted Answer

A)   Cu(NO3) 2
B)   CuCO3
C)   AgCl
D)   AlPO4

Question 10

The compound Mg(OH) 2 is commonly known as

Accepted Answer

A)   Epsom salt.
B)   Alka-Seltzer.
C)   smelling salts.
D)   milk of magnesia.

Question 11

When an acid reacts with a carbonate or hydrogen carbonate,the products are water,______________,and a salt.

Accepted Answer

The answer of When an acid reacts with a carbonate...

Question 12

The equation 4H2O2 → 4H2O + 2O2 is not appropriately written because

Accepted Answer

A)   oxygen is not diatomic.
B)   fractional coefficients are not generally used.
C)   the number of atoms of each element on each side is not the same.
D)   the simplest set of coefficients has not been used.

Question 13

When carbon combines with oxygen,energy is released to the surroundings.Thus this reaction

Accepted Answer

A)   is an acid-base reaction.
B)   is endothermic.
C)   never reaches equilibrium.
D)   is exothermic.

Question 14

The reaction Fe + CuSO4 → Cu + FeSO4 is a(n)______________-replacement reaction.

Accepted Answer

Question 15

For an endothermic reaction,the energy barrier is ______________ on the reactant side than on the product side.

Accepted Answer

A)   greater
B)   not different in size
C)   smaller

Question 16

Balance the chemical equation: PCl5 + H2O ? H3PO4 + HCl

Accepted Answer

PCl₅ + 4H₂O ...

Question 17

A solution with pH greater than 7 is classified as a(n)______________.

Accepted Answer

The answer of A solution with pH greater than 7...

Question 18

When the equation Sb2S3 + HCl → SbCl3 + H2S is balanced,the coefficient of HCl is

Accepted Answer

A)   1.
B)   6.
C)   2.
D)   4.

Question 19

A chemical reaction is balanced by applying all except which of the following principles?

Accepted Answer

A)   No atoms are gained, lost, or changed in identity.
B)   Only the numbers preceding formulas can be changed.
C)   The set of smallest whole numbers should be used.
D)   Subscripts in the formulas may be changed if necessary.

Question 20

One mole of aluminum consists of ______________ aluminum atoms.

Accepted Answer

The answer of One mole of aluminum consists of ______________...

Exam 13: Chemical Reactions

A solution with pH greater than 7 is classified as a(n)______________.

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When aqueous solutions of Na2CO3 and BaCl2 are mixed,the products are NaCl and ______________.

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When the equation Sb2S3 + HCl → SbCl3 + H2S is balanced,the coefficient of HCl is

Correct AnswerverifiedShow Answer

In general,fast reactions

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Increased temperature usually leads to an increase in reaction rate because collisions are

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In the reaction 2Al + 3F2→ 2AlF3,the aluminum

Correct AnswerverifiedShow Answer

A neutral aqueous solution has a pH of ______________.

Correct AnswerverifiedShow Answer

An acid added to a base will produce a

Correct AnswerverifiedShow Answer

When carbon combines with oxygen,energy is released to the surroundings.Thus this reaction

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The compound Mg(OH) 2 is commonly known as

Correct AnswerverifiedShow Answer

How many atoms of oxygen are in 1.00 mol of sulfur dioxide,SO2?

Correct AnswerverifiedShow Answer

The equation H2O2 → H2O + O is not correctly written because

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For an endothermic reaction,the energy barrier is ______________ on the reactant side than on the product side.

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One mole of aluminum consists of ______________ aluminum atoms.

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Which of the following compounds would not precipitate from an aqueous solution during a double-replacement reaction?

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When an acid reacts with a carbonate or hydrogen carbonate,the products are water,______________,and a salt.

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The reaction Fe + CuSO4 → Cu + FeSO4 is a(n)______________-replacement reaction.

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A chemical reaction is balanced by applying all except which of the following principles?

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Balance the chemical equation: PCl5 + H2O ? H3PO4 + HCl

Correct AnswerverifiedPCl5 + 4H2O ...View AnswerShow Answer

The equation 4H2O2 → 4H2O + 2O2 is not appropriately written because

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When aqueous solutions of Na₂CO₃ and BaCl₂ are mixed,the products are NaCl and ______________.

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When the equation Sb₂S₃ + HCl → SbCl₃ + H₂S is balanced,the coefficient of HCl is

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In the reaction 2Al + 3F₂→ 2AlF₃,the aluminum

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The compound Mg(OH) ₂ is commonly known as

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How many atoms of oxygen are in 1.00 mol of sulfur dioxide,SO₂?

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The equation H₂O₂ → H₂O + O is not correctly written because

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The reaction Fe + CuSO₄ → Cu + FeSO₄ is a(n)______________-replacement reaction.

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Balance the chemical equation: PCl₅ + H₂O ? H₃PO₄ + HCl

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PCl₅ + 4H₂O ...
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The equation 4H₂O₂ → 4H₂O + 2O₂ is not appropriately written because

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