Question 1

In a chemical reaction, the right side of the yield arrow is where the _____ can be found.

Accepted Answer

A)  reactants 
B)  products 
C)  both reactant and products 
A)  reactants 
B)  products 
C)  both reactant and products

Question 2

The combustion of 0.374 kg of methane in the presence of excess oxygen produces 0.983 kg of carbon dioxide. What is the percent yield?  Paired item 1)

Accepted Answer

A)  38.1 % 
B)  95.8 % 
C)  0.958 % 
A)  38.1 % 
B)  95.8 % 
C)  0.958 %

Question 3

How many moles of KOH are needed to neutralize 35.0 mL of 0.115 M HNO3 solution?

Accepted Answer

A)  4.03 x 10-3 moles 
B)  4.03 x 101 moles 
C)  1.15 x 10-1 moles 
A)  4.03 x 10-3 moles 
B)  4.03 x 101 moles 
C)  1.15 x 10-1 moles

Question 4

What is the theoretical yield of a reaction if the percent yield 92.4 % and product recovered is 89.3 g?

Accepted Answer

A)  89.3 g 
B)  96.6 g 
C)  82.5 g 
A)  89.3 g 
B)  96.6 g 
C)  82.5 g

Question 5

How many moles are in 1.25 g of calcium chloride?

Accepted Answer

A)  8.88 x 101 moles 
B)  1.39 x 102 moles 
C)  1.13 x 10-2 moles 
A)  8.88 x 101 moles 
B)  1.39 x 102 moles 
C)  1.13 x 10-2 moles

Question 6

How many grams are in 12.5 moles of BaOH)2?

Accepted Answer

A)  7.30 x 10-2 g 
B)  2.14 x 103 g 
C)  2.14 x 104 g 
A)  7.30 x 10-2 g 
B)  2.14 x 103 g 
C)  2.14 x 104 g

Question 7

Write the net ionic equation for a reaction between a strong acid and strong base.

Accepted Answer

A)  HClaq) + NaOHaq) $\rightarrow$  NaClaq) + H2Ol) 
B)  H+aq) + OH-aq) $\rightarrow$  H2Ol) 
C)  H2Ol) $\rightarrow$  H+aq) + OH-aq) 
A)  HClaq) + NaOHaq) $\rightarrow$  NaClaq) + H2Ol) 
B)  H+aq) + OH-aq) $\rightarrow$  H2Ol) 
C)  H2Ol) $\rightarrow$  H+aq) + OH-aq)

Question 8

What is the oxidation number of free elements?

Accepted Answer

A)  0 
B)  +1 
C)  +2 
A)  0 
B)  +1 
C)  +2

Question 9

What is the mass of ammonium chloride is 500.0 mL of a 0.198 M solution?

Accepted Answer

A)  10.6 g 
B)  5.30 g 
C)  5.30 x 103 g 
A)  10.6 g 
B)  5.30 g 
C)  5.30 x 103 g

Question 10

A reaction with an unknown theoretical yield was carried out and the amount of product obtained was a third of the theoretical yield. What is the percent yield?

Accepted Answer

A)  33.3 % 
B)  66.6 % 
C)  cannot be determined 
A)  33.3 % 
B)  66.6 % 
C)  cannot be determined

Question 11

What is the percent yield of a reaction if the product recovered is 89.4 g and the theoretical yield is 128.4 g?

Accepted Answer

A)  144 % 
B)  69.6 % 
C)  0.696 % 
A)  144 % 
B)  69.6 % 
C)  0.696 %

Question 12

Hydrogen peroxide readily decomposes in the presence of a catalyst to form oxygen gas and water. What is the correct balanced reaction?

Accepted Answer

A)  4HO2aq) $\rightarrow$ 3O2g) + 2H2Ol) 
B)  H2O2aq) $\rightarrow$ Og) + H2Ol) 
C)  2H2O2aq) $\rightarrow$ O2g) + 2H2Ol) 
A)  4HO2aq) $\rightarrow$ 3O2g) + 2H2Ol) 
B)  H2O2aq) $\rightarrow$ Og) + H2Ol) 
C)  2H2O2aq) $\rightarrow$ O2g) + 2H2Ol)

Question 13

What is the percent yield of a reaction if the product recovered is 21.2 g and the theoretical yield is 28.4 g?  Paired item 1)

Accepted Answer

A)  74.6 % 
B)  134 % 
C)  0.746 % 
A)  74.6 % 
B)  134 % 
C)  0.746 %

Question 14

How is a solid phase represented in a chemical reaction?

Accepted Answer

A)  s) 
B)  g) 
C)  l) 
A)  s) 
B)  g) 
C)  l)

Question 15

Which is the oxidizing agent in the combustion of methanol?

Accepted Answer

A)  CH3OH 
B)  O2 
C)  CO2 
A)  CH3OH 
B)  O2 
C)  CO2

Question 16

The coefficients in front of the substances in a chemical reaction indicate the number of each type of _____.

Accepted Answer

A)  ionic bond 
B)  covalent bond 
C)  molecule 
A)  ionic bond 
B)  covalent bond 
C)  molecule

Question 17

Ozone, O3, is a product in automobile exhaust by the reaction represented by the equation NO2g) + O2g) $\rightarrow$ NOg) + O3g). What mass of ozone is predicted to form from the reaction of 2.0 g NO2 in a car's exhaust and excess oxygen?

Accepted Answer

A)  1.1 g O3 
B)  1.8 g O3 
C)  2.1 g O3 
A)  1.1 g O3 
B)  1.8 g O3 
C)  2.1 g O3

Question 18

The reaction HNO3aq) + NaOHaq) $\rightarrow$  NaNO3aq) + H2Ol) is an example of _____?

Accepted Answer

A)  an acid-base reaction 
B)  a combustion reaction 
C)  a precipitation reaction 
A)  an acid-base reaction 
B)  a combustion reaction 
C)  a precipitation reaction

Question 19

Which is the reducing agent in the combustion of methanol?

Accepted Answer

A)  CH3OH 
B)  O2 
C)  CO2 
A)  CH3OH 
B)  O2 
C)  CO2

Question 20

Classify the following type of reaction: NaClaq) + AgNO3aq) $\rightarrow$  AgCls) + NaNO3aq).

Accepted Answer

A)  redox reaction 
B)  acid/base reaction 
C)  precipitation reaction 
A)  redox reaction 
B)  acid/base reaction 
C)  precipitation reaction

In a chemical reaction, the right side of the yield arrow is where the _____ can be found.

The combustion of 0.374 kg of methane in the presence of excess oxygen produces 0.983 kg of carbon dioxide. What is the percent yield? Paired item 1)

How many moles of KOH are needed to neutralize 35.0 mL of 0.115 M HNO₃ solution?

What is the theoretical yield of a reaction if the percent yield 92.4 % and product recovered is 89.3 g?

How many moles are in 1.25 g of calcium chloride?

How many grams are in 12.5 moles of BaOH)₂?

Write the net ionic equation for a reaction between a strong acid and strong base.

What is the oxidation number of free elements?

What is the mass of ammonium chloride is 500.0 mL of a 0.198 M solution?

A reaction with an unknown theoretical yield was carried out and the amount of product obtained was a third of the theoretical yield. What is the percent yield?

What is the percent yield of a reaction if the product recovered is 89.4 g and the theoretical yield is 128.4 g?

Hydrogen peroxide readily decomposes in the presence of a catalyst to form oxygen gas and water. What is the correct balanced reaction?

What is the percent yield of a reaction if the product recovered is 21.2 g and the theoretical yield is 28.4 g? Paired item 1)

How is a solid phase represented in a chemical reaction?

Which is the oxidizing agent in the combustion of methanol?

The coefficients in front of the substances in a chemical reaction indicate the number of each type of _____.

Ozone, O₃, is a product in automobile exhaust by the reaction represented by the equation NO₂g) + O₂g) $\rightarrow$ NOg) + O₃g). What mass of ozone is predicted to form from the reaction of 2.0 g NO₂ in a car's exhaust and excess oxygen?

The reaction HNO₃aq) + NaOHaq) $\rightarrow$ NaNO₃aq) + H₂Ol) is an example of _____?

Which is the reducing agent in the combustion of methanol?

Classify the following type of reaction: NaClaq) + AgNO₃aq) $\rightarrow$ AgCls) + NaNO₃aq).

Essential Ideas

Atoms, Molecules, and Ions

Composition of Substances and Solutions

Thermochemistry

Electronic Structure and Periodic Properties of Elements

Chemical Bonding and Molecular Geometry

Advanced Theories of Covalent Bonding

Gases

Liquids and Solids

Solutions and Colloids

Kinetics

Fundamental Equilibrium Concepts

Acid-Base Equilibria

Thermodynamics

Electrochemistry

Representative Metals, Metalloids, and Nonmetals

Organic Chemistry

Nuclear Chemistry

Filters

Exam 4: Stoichiometry of Chemical Reactions

In a chemical reaction, the right side of the yield arrow is where the _____ can be found.

The combustion of 0.374 kg of methane in the presence of excess oxygen produces 0.983 kg of carbon dioxide. What is the percent yield? Paired item 1)

How many moles of KOH are needed to neutralize 35.0 mL of 0.115 M HNO3 solution?

What is the theoretical yield of a reaction if the percent yield 92.4 % and product recovered is 89.3 g?

How many moles are in 1.25 g of calcium chloride?

How many grams are in 12.5 moles of BaOH)2?

Write the net ionic equation for a reaction between a strong acid and strong base.

What is the oxidation number of free elements?

What is the mass of ammonium chloride is 500.0 mL of a 0.198 M solution?

A reaction with an unknown theoretical yield was carried out and the amount of product obtained was a third of the theoretical yield. What is the percent yield?

What is the percent yield of a reaction if the product recovered is 89.4 g and the theoretical yield is 128.4 g?

Hydrogen peroxide readily decomposes in the presence of a catalyst to form oxygen gas and water. What is the correct balanced reaction?

What is the percent yield of a reaction if the product recovered is 21.2 g and the theoretical yield is 28.4 g? Paired item 1)

How is a solid phase represented in a chemical reaction?

Which is the oxidizing agent in the combustion of methanol?

The coefficients in front of the substances in a chemical reaction indicate the number of each type of _____.

Ozone, O3, is a product in automobile exhaust by the reaction represented by the equation NO2g) + O2g) →\rightarrow→ NOg) + O3g). What mass of ozone is predicted to form from the reaction of 2.0 g NO2 in a car's exhaust and excess oxygen?

The reaction HNO3aq) + NaOHaq) →\rightarrow→ NaNO3aq) + H2Ol) is an example of _____?

Which is the reducing agent in the combustion of methanol?

Classify the following type of reaction: NaClaq) + AgNO3aq) →\rightarrow→ AgCls) + NaNO3aq).

Essential Ideas

Atoms, Molecules, and Ions

Composition of Substances and Solutions

Thermochemistry

Electronic Structure and Periodic Properties of Elements

Chemical Bonding and Molecular Geometry

Advanced Theories of Covalent Bonding

Gases

Liquids and Solids

Solutions and Colloids

Kinetics

Fundamental Equilibrium Concepts

Acid-Base Equilibria

Thermodynamics

Electrochemistry

Representative Metals, Metalloids, and Nonmetals

Organic Chemistry

Nuclear Chemistry

Filters

How many moles of KOH are needed to neutralize 35.0 mL of 0.115 M HNO₃ solution?

How many grams are in 12.5 moles of BaOH)₂?

Ozone, O₃, is a product in automobile exhaust by the reaction represented by the equation NO₂g) + O₂g) $\rightarrow$ NOg) + O₃g). What mass of ozone is predicted to form from the reaction of 2.0 g NO₂ in a car's exhaust and excess oxygen?

The reaction HNO₃aq) + NaOHaq) $\rightarrow$ NaNO₃aq) + H₂Ol) is an example of _____?

Classify the following type of reaction: NaClaq) + AgNO₃aq) $\rightarrow$ AgCls) + NaNO₃aq).