Question 1

Blimps are essentially very large helium filled balloons. If a blimp contains 536 kg of helium, how many helium atoms are present inside the blimp?

Accepted Answer

A) 134, 000 He atoms 
B) 8.9 x 10-19 He atoms 
C) 8.06 x 1028 He atoms 
D) 3.23 x 1026 He atoms 
A) 134, 000 He atoms 
B) 8.9 x 10-19 He atoms 
C) 8.06 x 1028 He atoms 
D) 3.23 x 1026 He atoms

Question 2

What are the two half reactions that show how many electrons are gained or lost by each species in the reaction: 
NiS1U1P12+S1S1P0(aq)+ Mg(s) $\rarr$ Ni(s)+ MgS1U1P12+S1S1P0(aq)?

Accepted Answer

A) NiS1U1P12+S1S1P0(aq)+ eS1U1P1-S1S1P0 $\rarr$ Ni(s)and Mg(s)$\rarr$ MgS1U1P12+S1S1P0(aq)+ eS1U1P1-S1S1P0 
B) NiS1U1P12+S1S1P0(aq)+ 2 eS1U1P1- S1S1P0 $\rarr$ Ni(s)and Mg(s) $\rarr$MgS1U1P12+S1S1P0(aq)+ 2 eS1U1P1-S1S1P0 
C) NiS1U1P12+S1S1P0(aq) $\rarr$ Ni(s)+ 2 eS1U1P1-S1S1P0 and Mg(s)+ 2 eS1U1P1-S1S1P0$\rarr$MgS1U1P12+S1S1P0(aq) 
D) NiS1U1P12+S1S1P0(aq) $\rarr$Ni(s)+ eS1U1P1-S1S1P0 and Mg(s)+ eS1U1P1-S1S1P0 $\rarr$ MgS1U1P12+S1S1P0(aq) 
E) NiS1U1P12+S1S1P0(aq)+ 2 eS1U1P1- S1S1P0 $\rarr$ Ni(s)and Mg(s)+ 2 eS1U1P1-S1S1P0 $\rarr$ MgS1U1P12+S1S1P0(aq) 
A) NiS1U1P12+S1S1P0(aq)+ eS1U1P1-S1S1P0 $\rarr$ Ni(s)and Mg(s)$\rarr$ MgS1U1P12+S1S1P0(aq)+ eS1U1P1-S1S1P0 
B) NiS1U1P12+S1S1P0(aq)+ 2 eS1U1P1- S1S1P0 $\rarr$ Ni(s)and Mg(s) $\rarr$MgS1U1P12+S1S1P0(aq)+ 2 eS1U1P1-S1S1P0 
C) NiS1U1P12+S1S1P0(aq) $\rarr$ Ni(s)+ 2 eS1U1P1-S1S1P0 and Mg(s)+ 2 eS1U1P1-S1S1P0$\rarr$MgS1U1P12+S1S1P0(aq) 
D) NiS1U1P12+S1S1P0(aq) $\rarr$Ni(s)+ eS1U1P1-S1S1P0 and Mg(s)+ eS1U1P1-S1S1P0 $\rarr$ MgS1U1P12+S1S1P0(aq) 
E) NiS1U1P12+S1S1P0(aq)+ 2 eS1U1P1- S1S1P0 $\rarr$ Ni(s)and Mg(s)+ 2 eS1U1P1-S1S1P0 $\rarr$ MgS1U1P12+S1S1P0(aq)

Question 3

What is the mass of 3.81 mol of PH3?

Accepted Answer

A) 34.0 g 
B) 3.81 g 
C) 8.92 g 
D) 130. g 
E) 0.112 g 
A) 34.0 g 
B) 3.81 g 
C) 8.92 g 
D) 130. g 
E) 0.112 g

Question 4

How many moles of sulfur trioxide are formed from 3 moles of sulfur dioxide using the given balanced equation? 2 SO2 + O2$\rightarrow$  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 5

In the balanced redox reaction: 2 C2H6(g)+ 7 O2(g)$\rightarrow$ 4 CO2(g)+ 6 H2O(g), which species is oxidized?

Accepted Answer

A) C2H6(g) 
B) O2(g) 
C) CO2(g) 
D) H2O(g) 
A) C2H6(g) 
B) O2(g) 
C) CO2(g) 
D) H2O(g)

Question 6

In a chemical reaction, the actual yield of a product may be reduced by side reactions.

Accepted Answer

A) True 
 B)False

Question 7

A mole is a quantity that contains 6.02 × 10-23 atoms, molecules, or ions.

Accepted Answer

A) True 
 B)False

Question 8

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 9

_____ results in the loss of oxygen atoms or the gain of hydrogen atoms.

Accepted Answer

The answer of _____ results in the loss of oxygen...

Blimps are essentially very large helium filled balloons. If a blimp contains 536 kg of helium, how many helium atoms are present inside the blimp?

What are the two half reactions that show how many electrons are gained or lost by each species in the reaction: Ni²⁺(aq)+ Mg(s) $\rarr$ Ni(s)+ Mg²⁺(aq)?

What is the mass of 3.81 mol of PH₃?

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

In the balanced redox reaction: 2 C₂H₆(g)+ 7 O₂(g) $\rightarrow$ 4 CO₂(g)+ 6 H₂O(g), which species is oxidized?

In a chemical reaction, the actual yield of a product may be reduced by side reactions.

A mole is a quantity that contains 6.02 × 10^-23 atoms, molecules, or ions.

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.

_____ results in the loss of oxygen atoms or the gain of hydrogen atoms.

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

Digestion and the Conversion of Food Into Energy

Carbohydrate, Lipid, and Protein Metabolism

Filters

Exam 5: Chemical Reactions

Blimps are essentially very large helium filled balloons. If a blimp contains 536 kg of helium, how many helium atoms are present inside the blimp?

What are the two half reactions that show how many electrons are gained or lost by each species in the reaction: Ni2+(aq)+ Mg(s) →\rarr→ Ni(s)+ Mg2+(aq)?

What is the mass of 3.81 mol of PH3?

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

In the balanced redox reaction: 2 C2H6(g)+ 7 O2(g) →\rightarrow→ 4 CO2(g)+ 6 H2O(g), which species is oxidized?

In a chemical reaction, the actual yield of a product may be reduced by side reactions.

A mole is a quantity that contains 6.02 × 10-23 atoms, molecules, or ions.

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.

_____ results in the loss of oxygen atoms or the gain of hydrogen atoms.

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

Digestion and the Conversion of Food Into Energy

Carbohydrate, Lipid, and Protein Metabolism

Filters

What are the two half reactions that show how many electrons are gained or lost by each species in the reaction: Ni²⁺(aq)+ Mg(s) $\rarr$ Ni(s)+ Mg²⁺(aq)?

What is the mass of 3.81 mol of PH₃?

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

In the balanced redox reaction: 2 C₂H₆(g)+ 7 O₂(g) $\rightarrow$ 4 CO₂(g)+ 6 H₂O(g), which species is oxidized?

A mole is a quantity that contains 6.02 × 10^-23 atoms, molecules, or ions.