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%

The complete combustion of 0.285 g of a pure hydrocarbon yielded 0.878 g CO2 and 0.405 g H2O. What is the mass % C in this hydrocarbon?

A) 27.3% B) 24.0% C) 84.1% D) 32.4% E) 72.7% A) 27.3% B) 24.0% C) 84.1% D) 32.4% E) 72.7%

What is the correct name for the following organic structure? CH3CH2CH2CHClCH2CH2CH2COOH

A) octanoic acid B) octylchloride C) 5-octylchloride D) 5-chlorooctanoic acid E) 4-chlorooctanoic acid A) octanoic acid B) octylchloride C) 5-octylchloride D) 5-chlorooctanoic acid E) 4-chlorooctanoic acid

A mole of the substance water, H2O, refers to:

A) 12.0000 g H2O B) one H2O molecule C) 6.02 × 1023 g H2O D) 6.02 × 1023 H2O molecules E) 6.02 × 1023 atoms of H and O A) 12.0000 g H2O B) one H2O molecule C) 6.02 × 1023 g H2O D) 6.02 × 1023 H2O molecules E) 6.02 × 1023 atoms of H and O

The element M forms the chloride MCl4 containing 75.0% Cl by mass. What is the atomic weight of M?

A) 22.7 g/mol B) 21.2 g/mol C) 11.8 g/mol D) 39.55 g/mol E) 47.3 g/mol A) 22.7 g/mol B) 21.2 g/mol C) 11.8 g/mol D) 39.55 g/mol E) 47.3 g/mol

Exam 3: Chemical Compounds

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A strip of electrolytically purified copper weighing 3.178 grams is strongly heated in a stream of oxygen until it is all converted to a black oxide. The resultant black powder weighs 3.978 g. What is the formula of the oxide?

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Question 41

What is the percentage by weight of phosphorus in calcium phosphate, Ca₃(PO₄)₂?

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Question 42

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

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Question 43

Crystals from evaporation of urine analyze to 22.6% phosphorus. Which compound is probably present?

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Question 44

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 45

The complete combustion of 0.285 g of a pure hydrocarbon yielded 0.878 g CO₂ and 0.405 g H₂O. What is the mass % C in this hydrocarbon?

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Question 46

A 1.500 g sample of compound containing only C, H, and O was burned completely. The only combustion products were 1.738 g CO₂ and 0.711 g H₂O. What is the empirical formula of the compound?

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Question 47

What is the correct name for the following organic structure? CH₃CH₂CH₂CHClCH₂CH₂CH₂COOH

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Question 48

An organic compound contains C, H, and O. The percentages of H and C are 6.73% H, and 39.99% C by mass. The molar mass is 60.06 u. What is the molecular formula of the compound?

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Question 49

A mole of the substance water, H₂O, refers to:

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Question 50

Choose the INCORRECT name formula combination.

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Question 51

A 2.000 g sample of water contains 11.19% H by mass and 88.81% O by mass. What percent of H by mass will be found in a 6.00 g sample of water?

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Question 52

Choose the INCORRECT name formula combination.

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Question 53

The element M forms the chloride MCl₄ containing 75.0% Cl by mass. What is the atomic weight of M?

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Question 54

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?

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Question 55

Choose the INCORRECT name/formula combination.

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Question 56

What is the oxidation state of chlorine in sodium hypochlorite?

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Question 57

The oxidation state of silver in the complex ion Ag(CN)2- is ________.

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Question 58

Chemical nomenclature is a systematic way of assigning names to chemical compounds.

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Question 59

Oxidation state is related to the number of protons involved in bonding.

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Question 60

Showing 41 - 60 of 100

Exam 3: Chemical Compounds

A strip of electrolytically purified copper weighing 3.178 grams is strongly heated in a stream of oxygen until it is all converted to a black oxide. The resultant black powder weighs 3.978 g. What is the formula of the oxide?

What is the percentage by weight of phosphorus in calcium phosphate, Ca3(PO4)2?

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

Crystals from evaporation of urine analyze to 22.6% phosphorus. Which compound is probably present?

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

The complete combustion of 0.285 g of a pure hydrocarbon yielded 0.878 g CO2 and 0.405 g H2O. What is the mass % C in this hydrocarbon?

A 1.500 g sample of compound containing only C, H, and O was burned completely. The only combustion products were 1.738 g CO2 and 0.711 g H2O. What is the empirical formula of the compound?

What is the correct name for the following organic structure? CH3CH2CH2CHClCH2CH2CH2COOH

An organic compound contains C, H, and O. The percentages of H and C are 6.73% H, and 39.99% C by mass. The molar mass is 60.06 u. What is the molecular formula of the compound?

A mole of the substance water, H2O, refers to:

Choose the INCORRECT name formula combination.

A 2.000 g sample of water contains 11.19% H by mass and 88.81% O by mass. What percent of H by mass will be found in a 6.00 g sample of water?

Choose the INCORRECT name formula combination.

The element M forms the chloride MCl4 containing 75.0% Cl by mass. What is the atomic weight of M?

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?

Choose the INCORRECT name/formula combination.

What is the oxidation state of chlorine in sodium hypochlorite?

The oxidation state of silver in the complex ion Ag(CN)2- is ________.

Chemical nomenclature is a systematic way of assigning names to chemical compounds.

Oxidation state is related to the number of protons involved in bonding.

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: Additional Aspects

Intermolecular Forces: Liquids and Solids

Solutions and Their Physical Properties

Chemical Kinetics

Principles of Chemical Equilibrium

Acids and Bases

Additional Aspects of Acid-Base Equilibria

Solubility and Complex-Ion Equilibria

Spontaneous Change: Entropy and Free Energy

Electrochemistry

Main Group Elements I: Groups 1, 2, 13, and 14

Main Group Elements II: Groups 18, 17, 16, 15, and Hydrogen

The Transition Elements

Complex Ions and Coordination Compounds

Nuclear Chemistry 1-41

Structures of Organic Compounds

Reactions of Organic Compounds

Chemistry of the Living State

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What is the percentage by weight of phosphorus in calcium phosphate, Ca₃(PO₄)₂?

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

The complete combustion of 0.285 g of a pure hydrocarbon yielded 0.878 g CO₂ and 0.405 g H₂O. What is the mass % C in this hydrocarbon?

A 1.500 g sample of compound containing only C, H, and O was burned completely. The only combustion products were 1.738 g CO₂ and 0.711 g H₂O. What is the empirical formula of the compound?

What is the correct name for the following organic structure? CH₃CH₂CH₂CHClCH₂CH₂CH₂COOH

A mole of the substance water, H₂O, refers to:

The element M forms the chloride MCl₄ containing 75.0% Cl by mass. What is the atomic weight of M?

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?