The molecular formula for a sugar molecule is C12H22O11.What is the percent of carbon in the molecule?

A) 2.37% B) 67.88% C) 42.12% D) 8.34% E) 26.67% A) 2.37% B) 67.88% C) 42.12% D) 8.34% E) 26.67%

What is the mass of 8.50 × 1022 molecules of NH3?

A) 0.00829 g B) 0.417 g C) 2.40 g D) 121 g A) 0.00829 g B) 0.417 g C) 2.40 g D) 121 g

The name of the compound Cr(ClO4)3∙6H2O is ________.

A) chromium(III)perchlorate hexahydrate B) chromium(II)perchlorate hexahydrate C) chromate perchlorate hydrate D) chromate(III)perchlorate hexahydrate A) chromium(III)perchlorate hexahydrate B) chromium(II)perchlorate hexahydrate C) chromate perchlorate hydrate D) chromate(III)perchlorate hexahydrate

A compound has the following percentage composition,by weight: 22.0% Cu,12.9% Fe,16.6% C,19.4% N,and 29.1% H2O.Write a plausible (empirical)formula for this hydrate.

A) CuFe(CN)4 ∙ 4 H2O B) CuF(CN)4 ∙ 5 H2O C) Cu3Fe2(CN)12 ∙ 14 H2O D) CuF(CN)4 E) Cu3Fe2(CN)12 A) CuFe(CN)4 ∙ 4 H2O B) CuF(CN)4 ∙ 5 H2O C) Cu3Fe2(CN)12 ∙ 14 H2O D) CuF(CN)4 E) Cu3Fe2(CN)12

A 10.0 g sample of bismuth tribromide,BiBr3,contains:

A) 5.37 × 1022 total number of ions B) 0.322 mol BiBr3 C) 3.14 × 1022 formula units BiBr3 D) 1.34 × 1022 bromide ions E) 4.020 × 1022 total number of ions A) 5.37 × 1022 total number of ions B) 0.322 mol BiBr3 C) 3.14 × 1022 formula units BiBr3 D) 1.34 × 1022 bromide ions E) 4.020 × 1022 total number of ions

To produce ferrocene one requires 2.33 g of C5H5 (65.0 g/mol)for every 1.00 g of Fe used (55.9 g/mol).What is the value of x in the formula of ferrocene:

A) 1 B) 2 C) 3 D) 4 E) 5 A) 1 B) 2 C) 3 D) 4 E) 5

Exam 3: Chemical Compounds

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Combustion analysis of 1.200 g of an unknown compound containing carbon,hydrogen,and oxygen produced 2.086 g of CO₂ and 1.134 g of H₂O.What is the empirical formula of the compound?

(Multiple Choice)

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Question 61

A sample of pure lithium nitrate contains 10.1% lithium by mass.What is the % lithium by mass in a sample of pure lithium nitrate that has twice the mass of the first sample?

(Multiple Choice)

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Question 62

What is the empirical formula of a compound that is 62.0% C,10.4% H,and 27.5% O by mass?

(Multiple Choice)

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Question 63

The molecular formula for a sugar molecule is C₁₂H₂₂O₁₁.What is the percent of carbon in the molecule?

(Multiple Choice)

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Question 64

Choose the INCORRECT oxidation state.

(Multiple Choice)

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Question 65

Choose the INCORRECT statement.

(Multiple Choice)

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Question 66

Which one of the following is NOT an empirical formula?

(Multiple Choice)

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Question 67

From the following percent by mass compositions,determine the empirical formula of the compound. Li=18.0 %,P=26.7 %, O=55.3 %

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Question 68

Which of the following can be one of the isomers of a compound with molecular formula C₄H₁₀?

(Multiple Choice)

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Question 69

A 4.05 g sample of a compound containing only C,H,and O was burned completely.The only combustion products were 10.942 g CO₂ and 4.476 g H₂O.What is the empirical formula of the compound?

(Multiple Choice)

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Question 70

What is the mass of 8.50 × 10²² molecules of NH₃?

(Multiple Choice)

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Question 71

The name of the compound Cr(ClO₄)₃∙6H₂O is ________.

(Multiple Choice)

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Question 72

What is the oxidation number of the oxygen atom in Na₂O₂?

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Question 73

Which of the following is the correct chemical formula for a molecule of astatine?

(Multiple Choice)

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Question 74

A compound has the following percentage composition,by weight: 22.0% Cu,12.9% Fe,16.6% C,19.4% N,and 29.1% H₂O.Write a plausible (empirical)formula for this hydrate.

(Multiple Choice)

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Question 75

For an ionic compound,the term formula mass is more appropriate than the term molecular mass.

(True/False)

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Question 76

A 10.0 g sample of bismuth tribromide,BiBr₃,contains:

(Multiple Choice)

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Question 77

To produce ferrocene one requires 2.33 g of C₅H₅ (65.0 g/mol)for every 1.00 g of Fe used (55.9 g/mol).What is the value of x in the formula of ferrocene:

(Multiple Choice)

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Question 78

What mass of ammonia,NH₃,contains the same number of molecules as 3.00 g of trichlorofluoromethane,CCl₃F?

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Question 79

Which one of the following compounds contains ionic bonds?

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Question 80

Showing 61 - 80 of 152

Exam 3: Chemical Compounds

Combustion analysis of 1.200 g of an unknown compound containing carbon,hydrogen,and oxygen produced 2.086 g of CO2 and 1.134 g of H2O.What is the empirical formula of the compound?

A sample of pure lithium nitrate contains 10.1% lithium by mass.What is the % lithium by mass in a sample of pure lithium nitrate that has twice the mass of the first sample?

What is the empirical formula of a compound that is 62.0% C,10.4% H,and 27.5% O by mass?

The molecular formula for a sugar molecule is C12H22O11.What is the percent of carbon in the molecule?

Choose the INCORRECT oxidation state.

Choose the INCORRECT statement.

Which one of the following is NOT an empirical formula?

From the following percent by mass compositions,determine the empirical formula of the compound. Li=18.0 %,P=26.7 %, O=55.3 %

Which of the following can be one of the isomers of a compound with molecular formula C4H10?

A 4.05 g sample of a compound containing only C,H,and O was burned completely.The only combustion products were 10.942 g CO2 and 4.476 g H2O.What is the empirical formula of the compound?

What is the mass of 8.50 × 1022 molecules of NH3?

The name of the compound Cr(ClO4)3∙6H2O is ________.

What is the oxidation number of the oxygen atom in Na2O2?

Which of the following is the correct chemical formula for a molecule of astatine?

A compound has the following percentage composition,by weight: 22.0% Cu,12.9% Fe,16.6% C,19.4% N,and 29.1% H2O.Write a plausible (empirical)formula for this hydrate.

For an ionic compound,the term formula mass is more appropriate than the term molecular mass.

A 10.0 g sample of bismuth tribromide,BiBr3,contains:

To produce ferrocene one requires 2.33 g of C5H5 (65.0 g/mol)for every 1.00 g of Fe used (55.9 g/mol).What is the value of x in the formula of ferrocene:

What mass of ammonia,N H3,contains the same number of molecules as 3.00 g of trichlorofluoromethane,CCl3F?

Which one of the following compounds contains ionic bonds?

Matter: Its Properties and Measurement

Atoms and the Atomic Theory

Chemical Reactions

Introduction to Reactions in Aqueous Solutions

Gases

Thermochemistry

Electrons in Atoms

The Periodic Table and Some Atomic Properties

Chemical Bonding I: Basic Concepts

Chemical Bonding Ii: Valence Bond and Molecular Orbital Theories

Intermolecular Forces: Liquids and Solids

Spontaneous Change: Entropy and Gibbs Energy

Solutions and Their Physical Properties

Principles of Chemical Equilibrium

Acids and Bases

Additional Aspects of Acidbase Equilibria

Solubility and Complex-Ion Equilibria

Electrochemistry

Chemical Kinetics

Chemistry of the Main-Group Elements I: Groups 1,2,13,and 14

Chemistry of the Main-Group Elements Ii: Groups 18,17,16,15,and Hydrogen

The Transition Elements

Complex Ions and Coordination Compounds

Nuclear Chemistry

Structures of Organic Compounds

Reactions of Organic Compounds

Chemistry of the Living State

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Combustion analysis of 1.200 g of an unknown compound containing carbon,hydrogen,and oxygen produced 2.086 g of CO₂ and 1.134 g of H₂O.What is the empirical formula of the compound?

The molecular formula for a sugar molecule is C₁₂H₂₂O₁₁.What is the percent of carbon in the molecule?

Which of the following can be one of the isomers of a compound with molecular formula C₄H₁₀?

A 4.05 g sample of a compound containing only C,H,and O was burned completely.The only combustion products were 10.942 g CO₂ and 4.476 g H₂O.What is the empirical formula of the compound?

What is the mass of 8.50 × 10²² molecules of NH₃?

The name of the compound Cr(ClO₄)₃∙6H₂O is ________.

What is the oxidation number of the oxygen atom in Na₂O₂?

A compound has the following percentage composition,by weight: 22.0% Cu,12.9% Fe,16.6% C,19.4% N,and 29.1% H₂O.Write a plausible (empirical)formula for this hydrate.

A 10.0 g sample of bismuth tribromide,BiBr₃,contains:

To produce ferrocene one requires 2.33 g of C₅H₅ (65.0 g/mol)for every 1.00 g of Fe used (55.9 g/mol).What is the value of x in the formula of ferrocene:

What mass of ammonia,NH₃,contains the same number of molecules as 3.00 g of trichlorofluoromethane,CCl₃F?