Question 1

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

Accepted Answer

Question 2

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 3

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

Accepted Answer

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

Question 4

The compound Mg(OH)2 is commonly known as

Accepted Answer

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

Question 5

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. 
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 6

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

Question 7

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

Accepted Answer

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

Question 8

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

Question 9

One mole of aluminum consists of ______________ aluminum atoms.

Accepted Answer

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

Question 10

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

Accepted Answer

Question 11

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

Question 12

A neutral aqueous solution has a pH of ______________.

Accepted Answer

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

Question 13

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

Question 14

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. 
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 15

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. 
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 16

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

Accepted Answer

PCl₅ + 4H₂O

Question 17

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

Question 18

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

Question 19

In general,fast reactions

Accepted Answer

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

Question 20

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

Accepted Answer

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

Exam 13: Chemical Reactions

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

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

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

The compound Mg(OH)2 is commonly known as

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

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

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

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

One mole of aluminum consists of ______________ aluminum atoms.

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

An acid added to a base will produce a

A neutral aqueous solution has a pH of ______________.

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

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

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

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

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

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

In general,fast 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 ______________.

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

The compound Mg(OH)₂ is commonly known as

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

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

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

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

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

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