Question 1

In calculating the percent yield,both the actual yield and theoretical yield must be in units of grams.

Accepted Answer

A) True 
 B)False

Question 2

Consider the reaction: 2 Al(OH)3 + 3 H2SO4 → Al2(SO4)3 + 6 H2O. How many grams of Al2(SO4)3 are generated when 152 g of H2SO4 reacts?

Accepted Answer

A) 530. g of Al2(SO4)3 
B) 1590 g of Al2(SO4)3 
C) 177 g of Al2(SO4)3 
D) 43.6 g of Al2(SO4)3 
E) 131 g of Al2(SO4)3 
A) 530. g of Al2(SO4)3 
B) 1590 g of Al2(SO4)3 
C) 177 g of Al2(SO4)3 
D) 43.6 g of Al2(SO4)3 
E) 131 g of Al2(SO4)3

Question 3

In the balanced reaction: 2 I- + Cl2 → 2 Cl- + I2,________ is the reducing agent and ________ is the oxidizing agent.

Accepted Answer

Question 4

Tin (II)fluoride can be made by the following reaction: Sn(s)+ 2 HF(g)→ SnF2(s)+ H2(g). What is the maximum amount of SnF2 that can be produced when 0.480 moles of Sn are mixed with 0.720 moles of HF?

Accepted Answer

A) 0.360 moles of SnF2 
B) 0.480 moles of SnF2 
C) 0.600 moles of SnF2 
D) 0.720 moles of SnF2 
E) 1.20 moles of SnF2 
A) 0.360 moles of SnF2 
B) 0.480 moles of SnF2 
C) 0.600 moles of SnF2 
D) 0.720 moles of SnF2 
E) 1.20 moles of SnF2

Question 5

Identify the correct classification for the reaction H2O + SO3 → H2SO4

Accepted Answer

A) Combination 
B) Decomposition 
C) Single Replacement 
D) Double Replacement 
E) None of the choices are correct. 
A) Combination 
B) Decomposition 
C) Single Replacement 
D) Double Replacement 
E) None of the choices are correct.

Question 6

Which quantity has the greatest mass?

Accepted Answer

A) 2.0 mol of Na 
B) 2.0 mol of Na2O 
C) 2.0 mol of NaCl 
D) 2.0 mol of O2 
E) All of these quantities have the same mass. 
A) 2.0 mol of Na 
B) 2.0 mol of Na2O 
C) 2.0 mol of NaCl 
D) 2.0 mol of O2 
E) All of these quantities have the same mass.

Question 7

How many moles of sulfur trioxide are formed from 3 moles of sulfur dioxide using the given balanced equation? 2 SO2 + O2 → 2 SO3

Accepted Answer

A) 1 mol of SO3 
B) 2 mol of SO3 
C) 3 mol of SO3 
D) 5 mol of SO3 
E) 6 mol of SO3 
A) 1 mol of SO3 
B) 2 mol of SO3 
C) 3 mol of SO3 
D) 5 mol of SO3 
E) 6 mol of SO3

Question 8

When calculating the number of moles of calcium hydroxide formed from each mole of sodium hydroxide in the balanced reaction: CaCl2 + 2 NaOH ® Ca(OH)2 + 2 NaCl,the necessary conversion factor is ________.

Accepted Answer

1 mol Ca(O

Question 9

Complete the following table using the given balanced equation and the initial quantities of reactants. Equation: N2(g)+ 2 O2(g)→ 2 NO2(g)

Accepted Answer

A) 10 molecules formed 
B) 5 molecules formed 
C) 12 molecules formed 
D) 15 molecules formed 
A) 10 molecules formed 
B) 5 molecules formed 
C) 12 molecules formed 
D) 15 molecules formed

Question 10

Aluminum metal and oxygen gas are obtained when aluminum oxide is heated at high temperature. The reactant(s)in this chemical reaction is(are)________.

Accepted Answer

The answer of Aluminum metal and oxygen gas are obtained...

Question 11

In the chemical equation 2 Co(NO3)3 + 3 (NH4)2S → Co2S3 + 6 NH4NO3 ,how many nitrogen atoms are on each side of the equation?

Accepted Answer

A) 2 
B) 3 
C) 6 
D) 12 
E) 16 
A) 2 
B) 3 
C) 6 
D) 12 
E) 16

Question 12

All chemical reactions convert one substance into another.

Accepted Answer

A) True 
 B)False

Question 13

In the reaction: Ni2+(aq)+ Mg(s)→ Ni(s)+ Mg2+(aq),the species that undergoes reduction is Mg(s).

Accepted Answer

A) True 
 B)False

Question 14

The formula weight of a compound is the sum of the atomic weights of all the atoms in a compound,reported in atomic mass units.

Accepted Answer

A) True 
 B)False

Question 15

2 Co(NO3)3(aq)+ 3 (NH4)2S(aq)→ Co2S3(s)+ 3 NH4NO3(aq)is a properly balanced chemical equation.

Accepted Answer

A) True 
 B)False

Question 16

Consider the balanced reaction: 2 A + B → C,where the molar mass of B is less than the molar mass of A. It requires a smaller mass of A to completely react with given mass of B.

Accepted Answer

A) True 
 B)False

Question 17

The subscripts in chemical formulas are changed in order to balance a chemical equation.

Accepted Answer

A) True 
 B)False

Question 18

In a two-step synthesis where the first reaction has a 55% yield and the second reaction has a 24% yield,the overall percent yield of the reaction is _____% yield.

Accepted Answer

The answer of In a two-step synthesis where the first...

Question 19

How many moles of sodium chloride (table salt,NaCl,molar mass 58.44 g/mol)are contained in a 1.00 lb box of table salt?

Accepted Answer

A) 26,500 mol of NaCl 
B) 4.68 × 1024 mol of NaCl 
C) 58.44 mol NaCl 
D) 7.77 mol of NaCl 
E) 0.129 mol of NaCl 
A) 26,500 mol of NaCl 
B) 4.68 × 1024 mol of NaCl 
C) 58.44 mol NaCl 
D) 7.77 mol of NaCl 
E) 0.129 mol of NaCl

Question 20

How many carbon atoms are in 3.85 mol of carbon?

Accepted Answer

A) 3.85 carbon atoms 
B) 23.2 carbon atoms 
C) 6.02 × 1023 carbon atoms 
D) 2.32 × 1024 carbon atoms 
E) 6.40 × 10-24 carbon atoms 
A) 3.85 carbon atoms 
B) 23.2 carbon atoms 
C) 6.02 × 1023 carbon atoms 
D) 2.32 × 1024 carbon atoms 
E) 6.40 × 10-24 carbon atoms

Exam 5: Chemical Reactions

In calculating the percent yield,both the actual yield and theoretical yield must be in units of grams.

Consider the reaction: 2 Al(OH)3 + 3 H2SO4 → Al2(SO4)3 + 6 H2O. How many grams of Al2(SO4)3 are generated when 152 g of H2SO4 reacts?

In the balanced reaction: 2 I- + Cl2 → 2 Cl- + I2,________ is the reducing agent and ________ is the oxidizing agent.

Tin (II)fluoride can be made by the following reaction: Sn(s)+ 2 HF(g)→ SnF2(s)+ H2(g). What is the maximum amount of SnF2 that can be produced when 0.480 moles of Sn are mixed with 0.720 moles of HF?

Identify the correct classification for the reaction H2O + SO3 → H2SO4

Which quantity has the greatest mass?

How many moles of sulfur trioxide are formed from 3 moles of sulfur dioxide using the given balanced equation? 2 SO2 + O2 → 2 SO3

When calculating the number of moles of calcium hydroxide formed from each mole of sodium hydroxide in the balanced reaction: CaCl2 + 2 NaOH ® Ca(OH)2 + 2 NaCl,the necessary conversion factor is ________.

Complete the following table using the given balanced equation and the initial quantities of reactants. Equation: N2(g)+ 2 O2(g)→ 2 NO2(g)

Aluminum metal and oxygen gas are obtained when aluminum oxide is heated at high temperature. The reactant(s)in this chemical reaction is(are)________.

In the chemical equation 2 Co(NO3)3 + 3 (NH4)2S → Co2S3 + 6 NH4NO3 ,how many nitrogen atoms are on each side of the equation?

All chemical reactions convert one substance into another.

In the reaction: Ni2+(aq)+ Mg(s)→ Ni(s)+ Mg2+(aq),the species that undergoes reduction is Mg(s).

The formula weight of a compound is the sum of the atomic weights of all the atoms in a compound,reported in atomic mass units.

2 Co(NO3)3(aq)+ 3 (NH4)2S(aq)→ Co2S3(s)+ 3 NH4NO3(aq)is a properly balanced chemical equation.

Consider the balanced reaction: 2 A + B → C,where the molar mass of B is less than the molar mass of A. It requires a smaller mass of A to completely react with given mass of B.

The subscripts in chemical formulas are changed in order to balance a chemical equation.

In a two-step synthesis where the first reaction has a 55% yield and the second reaction has a 24% yield,the overall percent yield of the reaction is _____% yield.

How many moles of sodium chloride (table salt,NaCl,molar mass 58.44 g/mol)are contained in a 1.00 lb box of table salt?

How many carbon atoms are in 3.85 mol of carbon?

Matter and Measurement

Atoms and the Periodic Table

Ionic Compounds

Covalent Compounds

Energy Changes,reaction Rates,and Equilibrium

Gases,liquids,and Solids

Solutions

Acids and Bases

Nuclear Chemistry

Introduction to Organic Molecules and Functional Groups

Alkanes

Unsaturated Hydrocarbons

Organic Compounds That Contain Oxygen,halogen,or Sulfur

The Three-Dimensional Shape of Molecules

Aldehydes and Ketones

Carboxylic Acids,esters,and Amides

Amines and Neurotransmitters

Lipids

Carbohydrates

Amino Acids,proteins,and Enzymes

Nucleic Acids and Protein Synthesis

Metabolism and Energy Production

Carbohydrate,lipid,and Protein Metabolism

Filters

Consider the reaction: 2 Al(OH)₃ + 3 H₂SO₄ → Al₂(SO₄)₃ + 6 H₂O. How many grams of Al₂(SO₄)₃ are generated when 152 g of H₂SO₄ reacts?

In the balanced reaction: 2 I^- + Cl₂ → 2 Cl^- + I₂, is the reducing agent and is the oxidizing agent.

Tin (II)fluoride can be made by the following reaction: Sn(s)+ 2 HF(g)→ SnF₂(s)+ H₂(g). What is the maximum amount of SnF₂ that can be produced when 0.480 moles of Sn are mixed with 0.720 moles of HF?

Identify the correct classification for the reaction H₂O + SO₃ → H₂SO₄

How many moles of sulfur trioxide are formed from 3 moles of sulfur dioxide using the given balanced equation? 2 SO₂ + O₂ → 2 SO₃

Complete the following table using the given balanced equation and the initial quantities of reactants. Equation: N₂(g)+ 2 O₂(g)→ 2 NO₂(g)

In the chemical equation 2 Co(NO₃)₃ + 3 (NH₄)₂S → Co₂S₃ + 6 NH₄NO₃ ,how many nitrogen atoms are on each side of the equation?

In the reaction: Ni²⁺(aq)+ Mg(s)→ Ni(s)+ Mg²⁺(aq),the species that undergoes reduction is Mg(s).

2 Co(NO₃)₃(aq)+ 3 (NH₄)₂S(aq)→ Co₂S₃(s)+ 3 NH₄NO₃(aq)is a properly balanced chemical equation.