Fuming sulfuric acid is obtained by the addition of SO3 to concentrated H2SO4. The fumes result from the reaction of SO3 gas with water vapor. What is the product when one molecule of SO3 reacts with one molecule of water?

A) two molecules of sulfurous acid B) one sulfate ion C) two sulfite ions D) one molecule of sulfuric acid E) two molecules of sulfuric acid A) two molecules of sulfurous acid B) one sulfate ion C) two sulfite ions D) one molecule of sulfuric acid E) two molecules of sulfuric acid

A sample of water (H2O) contains 1.81 1024 molecules. How many total moles of atoms are there in this sample?

A) 1.00 B) 2.00 C) 3.00 D) 6.00 E) 9.00 A) 1.00 B) 2.00 C) 3.00 D) 6.00 E) 9.00

What mass of phosphoric acid (H3PO4, 98.0 g/mol) is produced from the reaction of 10.0 g of P4O10 (284 g/mol) with excess water?

A) 10.9 g B) 40.0 g C) 10.0 g D) 13.8 g E) 2.50 g A) 10.9 g B) 40.0 g C) 10.0 g D) 13.8 g E) 2.50 g

As a purchasing agent for a pharmaceutical company, how much chlorine, Cl2, do you need to order to react completely with 500 kg of platinum, Pt, to make cisplatin, PtCl2(NH3)2?

A) 182 kg B) 500 kg C) 2,564 kg D) 364 kg E) 91 kg A) 182 kg B) 500 kg C) 2,564 kg D) 364 kg E) 91 kg

Exam 3: Stoichiometry: Mass, Formulas, and Reactions

Elemental analysis of the soot produced by a candle flame shows that it is 14.3% H and 85.7% C by mass. What is the empirical formula of this hydrocarbon?

(Multiple Choice)

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Question 41

Nicotine is an alkaloid and a component of cigarettes that contribute to the addictive properties of tobacco. Mass analysis reveals that it has the empirical formula C₅H₇N. If the molar mass is 162.23 g/mol, which molecular formula is correct?

(Multiple Choice)

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Question 42

Identify the set of stoichiometric coefficients that balances the reaction equation for the combustion of octane. C₈H₁₈ O₂ CO₂ H₂O

(Multiple Choice)

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Question 43

How many gold atoms are there in a 1.00 kg bar of gold?

(Multiple Choice)

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Question 44

Fuming sulfuric acid is obtained by the addition of SO₃ to concentrated H₂SO₄. The fumes result from the reaction of SO₃ gas with water vapor. What is the product when one molecule of SO₃ reacts with one molecule of water?

(Multiple Choice)

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Question 45

A gas is produced when fruit ripens. That gas can be used in mixtures with nitrogen gas to ripen bananas just before they are put on the grocery shelf. This mixture is sold as banana gas. The mass percentages of carbon and hydrogen in this gas are 85.62% for C and 14.38% for H. The molar mass was found to be twice the empirical formula unit molar mass. What is the molecular formula of this gas?

(Multiple Choice)

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Question 46

Which of the following oxides of nitrogen have the same empirical formulas? N₂O, NO, NO₂, N₂O₂, N₂O₄

(Essay)

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Question 47

Calculate the mass percent of each element in Ibuprofen (C₁₃H₁₈O₂), a drug typically used to treat pain, fever, or inflammation.

(Short Answer)

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Question 48

A sample of water (H₂O) contains 1.81 10²⁴ molecules. How many total moles of atoms are there in this sample?

(Multiple Choice)

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Question 49

Which of the following contains the largest number of atoms?

(Multiple Choice)

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Question 50

One form of asbestos called chrysotile is considered to be a human carcinogen. Mass analysis reveals that it has the empirical formula Mg₃Si₂H₄O₉. If the molar mass is 831 g/mol, which molecular formula is correct?

(Multiple Choice)

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Question 51

At the Tesla automotive factory, a Model S sedan is built using 4 tires, a main chassis, and 5 lithium ion batteries. How many sedans can be made if there are 17 tires, 5 chassis, and 22 batteries?

(Multiple Choice)

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Question 52

A reaction vessel contains equal masses of iron and oxygen. How much FeO could theoretically be produced?

(Multiple Choice)

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Question 53

Respiration is to photosynthesis as ________

(Multiple Choice)

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Question 54

Which molecules shown below have the same molecular formula?

(Multiple Choice)

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Question 55

For which of the following compounds are the empirical and molecular formulas the same? Acetic acid, found in vinegar, CH₃COOH Formaldehyde, used to preserve biological specimens, CH₂O Ethanol, found in beer and wine, CH₃CH₂OH

(Short Answer)

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Question 56

Copper sulfate is a blue solid that is used to control algae growth. Solutions of copper sulfate that come in contact with the surface of galvanized (zinc-plated) steel pails undergo the following reaction that forms copper metal on the zinc surface. How many grams of zinc would react with 454 g (1 lb) of copper sulfate (160 g/mol)? CuSO₄(aq) Zn(s) Cu(s) ZnSO₄(aq)

(Multiple Choice)

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Question 57

What mass of phosphoric acid (H₃PO₄, 98.0 g/mol) is produced from the reaction of 10.0 g of P₄O₁₀ (284 g/mol) with excess water?

(Multiple Choice)

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Question 58

As a purchasing agent for a pharmaceutical company, how much chlorine, Cl₂, do you need to order to react completely with 500 kg of platinum, Pt, to make cisplatin, PtCl₂(NH₃)₂?

(Multiple Choice)

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Question 59

Which statement about the following chemical reaction is not correct? 2NH₃ + 2O₂ $\to$ N₂O + 3H₂O

(Multiple Choice)

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Question 60

Showing 41 - 60 of 141

Elemental analysis of the soot produced by a candle flame shows that it is 14.3% H and 85.7% C by mass. What is the empirical formula of this hydrocarbon?

Nicotine is an alkaloid and a component of cigarettes that contribute to the addictive properties of tobacco. Mass analysis reveals that it has the empirical formula C₅H₇N. If the molar mass is 162.23 g/mol, which molecular formula is correct?

Identify the set of stoichiometric coefficients that balances the reaction equation for the combustion of octane. C₈H₁₈ O₂ CO₂ H₂O

How many gold atoms are there in a 1.00 kg bar of gold?

Fuming sulfuric acid is obtained by the addition of SO₃ to concentrated H₂SO₄. The fumes result from the reaction of SO₃ gas with water vapor. What is the product when one molecule of SO₃ reacts with one molecule of water?

Which of the following oxides of nitrogen have the same empirical formulas? N₂O, NO, NO₂, N₂O₂, N₂O₄

Calculate the mass percent of each element in Ibuprofen (C₁₃H₁₈O₂), a drug typically used to treat pain, fever, or inflammation.

A sample of water (H₂O) contains 1.81 10²⁴ molecules. How many total moles of atoms are there in this sample?

Which of the following contains the largest number of atoms?

One form of asbestos called chrysotile is considered to be a human carcinogen. Mass analysis reveals that it has the empirical formula Mg₃Si₂H₄O₉. If the molar mass is 831 g/mol, which molecular formula is correct?

At the Tesla automotive factory, a Model S sedan is built using 4 tires, a main chassis, and 5 lithium ion batteries. How many sedans can be made if there are 17 tires, 5 chassis, and 22 batteries?

A reaction vessel contains equal masses of iron and oxygen. How much FeO could theoretically be produced?

Respiration is to photosynthesis as ________

Which molecules shown below have the same molecular formula?

For which of the following compounds are the empirical and molecular formulas the same? Acetic acid, found in vinegar, CH₃COOH Formaldehyde, used to preserve biological specimens, CH₂O Ethanol, found in beer and wine, CH₃CH₂OH

What mass of phosphoric acid (H₃PO₄, 98.0 g/mol) is produced from the reaction of 10.0 g of P₄O₁₀ (284 g/mol) with excess water?

As a purchasing agent for a pharmaceutical company, how much chlorine, Cl₂, do you need to order to react completely with 500 kg of platinum, Pt, to make cisplatin, PtCl₂(NH₃)₂?

Which statement about the following chemical reaction is not correct? 2NH₃ + 2O₂ $\to$ N₂O + 3H₂O

Matter and Energy: The Origin of the Universe

Atoms, Ions, and Molecules: Matter Starts Here

Solution Chemistry: The Hydrosphere

Thermochemistry: Energy Changes in Reactions

Properties of Gases: The Air We Breathe

A Quantum Model of Atoms: Waves and Particles

Chemical Bonds: What Makes a Gas a Greenhouse Gas

Molecular Geometry: Shape Determines Function

Intermolecular Forces: The Uniqueness of Water

Solutions: Properties and Behavior

Solids: Crystals, Alloys, and Polymers

Chemical Kinetics: Reactions in the Atmosphere

Chemical Equilibrium: How Much Product Does a Reaction Really Make

Acidbase Equilibria: Proton Transfer in Biological Systems

Additional Aqueous Equilibria: Chemistry and the Oceans

Thermodynamics: Spontaneous and Nonspontaneous Reactions and Processes

Electrochemistry: The Quest for Clean Energy

Nuclear Chemistry: Applications to Energy and Medicine

Organic and Biological Molecules: the Compounds of Life

The Main Group Elements: Life and the Periodic Table

Transition Metals: Biological and Medical Applications

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Exam 3: Stoichiometry: Mass, Formulas, and Reactions

Elemental analysis of the soot produced by a candle flame shows that it is 14.3% H and 85.7% C by mass. What is the empirical formula of this hydrocarbon?

Nicotine is an alkaloid and a component of cigarettes that contribute to the addictive properties of tobacco. Mass analysis reveals that it has the empirical formula C5H7N. If the molar mass is 162.23 g/mol, which molecular formula is correct?

Identify the set of stoichiometric coefficients that balances the reaction equation for the combustion of octane. C8H18 O2 CO2 H2O

How many gold atoms are there in a 1.00 kg bar of gold?

Fuming sulfuric acid is obtained by the addition of SO3 to concentrated H2SO4. The fumes result from the reaction of SO3 gas with water vapor. What is the product when one molecule of SO3 reacts with one molecule of water?

Which of the following oxides of nitrogen have the same empirical formulas? N2O, NO, NO2, N2O2, N2O4

Calculate the mass percent of each element in Ibuprofen (C13H18O2), a drug typically used to treat pain, fever, or inflammation.

A sample of water (H2O) contains 1.81 1024 molecules. How many total moles of atoms are there in this sample?

Which of the following contains the largest number of atoms?

One form of asbestos called chrysotile is considered to be a human carcinogen. Mass analysis reveals that it has the empirical formula Mg3Si2H4O9. If the molar mass is 831 g/mol, which molecular formula is correct?

At the Tesla automotive factory, a Model S sedan is built using 4 tires, a main chassis, and 5 lithium ion batteries. How many sedans can be made if there are 17 tires, 5 chassis, and 22 batteries?

A reaction vessel contains equal masses of iron and oxygen. How much FeO could theoretically be produced?

Respiration is to photosynthesis as ________

Which molecules shown below have the same molecular formula?

For which of the following compounds are the empirical and molecular formulas the same? Acetic acid, found in vinegar, CH3COOH Formaldehyde, used to preserve biological specimens, CH2O Ethanol, found in beer and wine, CH3CH2OH

What mass of phosphoric acid (H3PO4, 98.0 g/mol) is produced from the reaction of 10.0 g of P4O10 (284 g/mol) with excess water?

As a purchasing agent for a pharmaceutical company, how much chlorine, Cl2, do you need to order to react completely with 500 kg of platinum, Pt, to make cisplatin, PtCl2(NH3)2?

Which statement about the following chemical reaction is not correct? 2NH3 + 2O2 →\to→ N2O + 3H2O

Matter and Energy: The Origin of the Universe

Atoms, Ions, and Molecules: Matter Starts Here

Solution Chemistry: The Hydrosphere

Thermochemistry: Energy Changes in Reactions

Properties of Gases: The Air We Breathe

A Quantum Model of Atoms: Waves and Particles

Chemical Bonds: What Makes a Gas a Greenhouse Gas

Molecular Geometry: Shape Determines Function

Intermolecular Forces: The Uniqueness of Water

Solutions: Properties and Behavior

Solids: Crystals, Alloys, and Polymers

Chemical Kinetics: Reactions in the Atmosphere

Chemical Equilibrium: How Much Product Does a Reaction Really Make

Acidbase Equilibria: Proton Transfer in Biological Systems

Additional Aqueous Equilibria: Chemistry and the Oceans

Thermodynamics: Spontaneous and Nonspontaneous Reactions and Processes

Electrochemistry: The Quest for Clean Energy

Nuclear Chemistry: Applications to Energy and Medicine

Organic and Biological Molecules: the Compounds of Life

The Main Group Elements: Life and the Periodic Table

Transition Metals: Biological and Medical Applications

Filters

Nicotine is an alkaloid and a component of cigarettes that contribute to the addictive properties of tobacco. Mass analysis reveals that it has the empirical formula C₅H₇N. If the molar mass is 162.23 g/mol, which molecular formula is correct?

Identify the set of stoichiometric coefficients that balances the reaction equation for the combustion of octane. C₈H₁₈ O₂ CO₂ H₂O

Fuming sulfuric acid is obtained by the addition of SO₃ to concentrated H₂SO₄. The fumes result from the reaction of SO₃ gas with water vapor. What is the product when one molecule of SO₃ reacts with one molecule of water?

Which of the following oxides of nitrogen have the same empirical formulas? N₂O, NO, NO₂, N₂O₂, N₂O₄

Calculate the mass percent of each element in Ibuprofen (C₁₃H₁₈O₂), a drug typically used to treat pain, fever, or inflammation.

A sample of water (H₂O) contains 1.81 10²⁴ molecules. How many total moles of atoms are there in this sample?

One form of asbestos called chrysotile is considered to be a human carcinogen. Mass analysis reveals that it has the empirical formula Mg₃Si₂H₄O₉. If the molar mass is 831 g/mol, which molecular formula is correct?

For which of the following compounds are the empirical and molecular formulas the same? Acetic acid, found in vinegar, CH₃COOH Formaldehyde, used to preserve biological specimens, CH₂O Ethanol, found in beer and wine, CH₃CH₂OH

What mass of phosphoric acid (H₃PO₄, 98.0 g/mol) is produced from the reaction of 10.0 g of P₄O₁₀ (284 g/mol) with excess water?

As a purchasing agent for a pharmaceutical company, how much chlorine, Cl₂, do you need to order to react completely with 500 kg of platinum, Pt, to make cisplatin, PtCl₂(NH₃)₂?

Which statement about the following chemical reaction is not correct? 2NH₃ + 2O₂ $\to$ N₂O + 3H₂O