Question 1

What is the minimum mass of oxygen gas necessary to produce 200.g of sulfuric acid in the following reaction?
2SO2 + O2 + 2 H2O $\rarr$2H2SO4

Accepted Answer

Question 2

The mass of 1.21 * 1020 atoms of sulfur is

Accepted Answer

A) (3.88 * 1021 g.) 
B) 2.00 mg. 
C) 32.06 g. 
D) 6.44 mg. 
E) (2.00 * 10-4 g.) 
A) (3.88 * 1021 g.) 
B) 2.00 mg. 
C) 32.06 g. 
D) 6.44 mg. 
E) (2.00 * 10-4 g.)

Question 3

Calculate the molecular mass, in g/mol, of P4O10.

Accepted Answer

Question 4

Oxidation of a hydrocarbon gave a product composed of carbon, hydrogen, and oxygen.The product that was purified and sent off for elemental analysis giving the following mass percents: 68.85% C and 4.95% H.Determine the empirical formula of this compound.

Accepted Answer

The answer of Oxidation of a hydrocarbon gave a product...

Question 5

There are two stable isotopes of chlorine: chlorine-35, with a mass of 34.968853 amu; and chlorine-37, with a mass of 36.965903.Given that the average atomic mass of a chlorine atom is 35.45 amu, which of the following statements is true?

Accepted Answer

A) Chlorine contains almost exclusively of   , with very little   Cl. 
B) Chlorine contains more   Cl than   Cl. 
C) Chlorine contains roughly equal amounts of   Cl and   Cl. 
D) Chlorine contains more   Cl than   Cl. 
E) Chlorine contains almost exclusively of   Cl, with very little   Cl. 
A) Chlorine contains almost exclusively of   , with very little   Cl. 
B) Chlorine contains more   Cl than   Cl. 
C) Chlorine contains roughly equal amounts of   Cl and   Cl. 
D) Chlorine contains more   Cl than   Cl. 
E) Chlorine contains almost exclusively of   Cl, with very little   Cl.

Question 6

Balance the following equation using the smallest set of whole numbers, then add together the coefficients.Don't forget to count coefficients of one.The sum of the coefficients is ___ Cr + ___ H2SO4 $\rarr$ ___ Cr2(SO4)3 + ___ H2

Accepted Answer

A) 4. 
B) 9. 
C) 11. 
D) 13. 
E) 15. 
A) 4. 
B) 9. 
C) 11. 
D) 13. 
E) 15.

Question 7

What is the average mass, in grams, of one atom of iron?

Accepted Answer

A) 6.02 * 1023 g 
B) 1.66 * 10-24 g 
C) 9.28 * 10-23 g 
D) 55.85 g 
E) 55.85 * 10-23 g 
A) 6.02 * 1023 g 
B) 1.66 * 10-24 g 
C) 9.28 * 10-23 g 
D) 55.85 g 
E) 55.85 * 10-23 g

Question 8

How many fluorine atoms are there in 65 g of CF4?

Accepted Answer

A) 0.74 atoms 
B) 3.0 atoms 
C) 4.5 * 1023 atoms 
D) 1.8 * 1024 atoms 
E) 2.4 * 1023 atoms 
A) 0.74 atoms 
B) 3.0 atoms 
C) 4.5 * 1023 atoms 
D) 1.8 * 1024 atoms 
E) 2.4 * 1023 atoms

What is the minimum mass of oxygen gas necessary to produce 200.g of sulfuric acid in the following reaction? 2SO₂ + O₂ + 2 H₂O $\rarr$ 2H₂SO₄

The mass of 1.21 * 10²⁰ atoms of sulfur is

Calculate the molecular mass, in g/mol, of P₄O₁₀.

Oxidation of a hydrocarbon gave a product composed of carbon, hydrogen, and oxygen.The product that was purified and sent off for elemental analysis giving the following mass percents: 68.85% C and 4.95% H.Determine the empirical formula of this compound.

There are two stable isotopes of chlorine: chlorine-35, with a mass of 34.968853 amu; and chlorine-37, with a mass of 36.965903.Given that the average atomic mass of a chlorine atom is 35.45 amu, which of the following statements is true?

Balance the following equation using the smallest set of whole numbers, then add together the coefficients.Don't forget to count coefficients of one.The sum of the coefficients is _ Cr + _ H₂SO₄ $\rarr$ _ Cr₂(SO₄)₃+ _ H₂

What is the average mass, in grams, of one atom of iron?

How many fluorine atoms are there in 65 g of CF₄?

Chemistry: The Study of Change

Atoms, Molecules, and Ions

Reactions in Aqueous Solution

Gases

Thermo-Chemistry

Quantum Theory and the Electronic Structure of Atoms

Periodic Relationships Among the Elements

Chemical Bonding I: Basic Concepts

Chemical Bonding Ii: Molecular Geometry and Hybridization of Atomic Orbitals

Intermolecular Forces and Liquids and Solids

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Chemistry in the Atmosphere

Entropy, Free Energy, and Equilibrium

Electrochemistry

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Transition Metal Chemistry and Coordination Compounds

Nuclear Chemistry

Organic Chemistry

Synthetic and Natural Organic Polymers

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Exam 3: Mass Relationships in Chemical Reactions

What is the minimum mass of oxygen gas necessary to produce 200.g of sulfuric acid in the following reaction? 2SO2 + O2 + 2 H2O →\rarr→ 2H2SO4

The mass of 1.21 * 1020 atoms of sulfur is

Calculate the molecular mass, in g/mol, of P4O10.

Oxidation of a hydrocarbon gave a product composed of carbon, hydrogen, and oxygen.The product that was purified and sent off for elemental analysis giving the following mass percents: 68.85% C and 4.95% H.Determine the empirical formula of this compound.

There are two stable isotopes of chlorine: chlorine-35, with a mass of 34.968853 amu; and chlorine-37, with a mass of 36.965903.Given that the average atomic mass of a chlorine atom is 35.45 amu, which of the following statements is true?

Balance the following equation using the smallest set of whole numbers, then add together the coefficients.Don't forget to count coefficients of one.The sum of the coefficients is ___ Cr + ___ H2SO4 →\rarr→ ___ Cr2(SO4)3 + ___ H2

What is the average mass, in grams, of one atom of iron?

How many fluorine atoms are there in 65 g of CF4?

Chemistry: The Study of Change

Atoms, Molecules, and Ions

Reactions in Aqueous Solution

Gases

Thermo-Chemistry

Quantum Theory and the Electronic Structure of Atoms

Periodic Relationships Among the Elements

Chemical Bonding I: Basic Concepts

Chemical Bonding Ii: Molecular Geometry and Hybridization of Atomic Orbitals

Intermolecular Forces and Liquids and Solids

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Chemistry in the Atmosphere

Entropy, Free Energy, and Equilibrium

Electrochemistry

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Transition Metal Chemistry and Coordination Compounds

Nuclear Chemistry

Organic Chemistry

Synthetic and Natural Organic Polymers

Filters

What is the minimum mass of oxygen gas necessary to produce 200.g of sulfuric acid in the following reaction? 2SO₂ + O₂ + 2 H₂O $\rarr$ 2H₂SO₄

The mass of 1.21 * 10²⁰ atoms of sulfur is

Calculate the molecular mass, in g/mol, of P₄O₁₀.

Balance the following equation using the smallest set of whole numbers, then add together the coefficients.Don't forget to count coefficients of one.The sum of the coefficients is _ Cr + _ H₂SO₄ $\rarr$ _ Cr₂(SO₄)₃+ _ H₂

How many fluorine atoms are there in 65 g of CF₄?