During a fermentation process, sucrose (C12H22O11) can react with water to form ethanol (C2H5OH) and carbon dioxide gas.What is the sum of the coefficients in the balanced chemical equation?

A) 8 B) 10 C) 12 D) 14 E) 16 A) 8 B) 10 C) 12 D) 14 E) 16

A compound containing bromine and fluorine used in the production of UF6 is 58.37% Br by mass.What is the empirical formula for the compound?

A) BrF B) Br2F3 C) BrF3 D) BrF5 E) Br3F2 A) BrF B) Br2F3 C) BrF3 D) BrF5 E) Br3F2

What is the theoretical yield of iron (55.845 g/mol) when 10.0 g Fe 2O3 (159.69 g/mol) reacts with excess carbon (12.01 g/mol)? 2 Fe2O3 (s) + 3 C(s) $\rightarrow$ 4 Fe(s) + 3 CO2 (g)

A) 3.50 g B) 57.2 g C) 14.3 g D) 6.99 g E) 1.75 g A) 3.50 g B) 57.2 g C) 14.3 g D) 6.99 g E) 1.75 g

Aluminum can form clusters that behave similarly to certain atoms.The "superatom," Al13, is thought to mimic chlorine.Suppose you create a process that generates KAl 13 (389.86 g/mol) and oxygen gas from aluminum oxide (101.96 g/mol) and potassium metal.How many grams of KAl13 could be produced by the reaction of 102 g of Al2O3? You will need to write a balanced chemical reaction.

A) 390.g B) 97.5 g C) 60.0 g D) 15.00 g E) 141 g A) 390.g B) 97.5 g C) 60.0 g D) 15.00 g E) 141 g

Elemental phosphorus (P4) reacts vigorously with halogens at room temperature to produce phosphorus trihalides.How many grams of PF3 (87.97 g/mol) can be produced using excess fluorine (38.00 g/mol) and 5.49 g P4 (123.88 g/mol)? P 4 (s) + 6 F2 (g) $\rightarrow$4 PF3 (g)

The answer of Elemental phosphorus (P4) reacts vigorously with halogens...

Exam 7: Stoichiometry Mass Relationships and Chemical Reactions

White phosphorus (123.88 g/mol) is produced by the reaction of calcium phosphate (310.18 g/mol), silicon dioxide (60.09 g/mol), and carbon (12.01 g/mol).How many grams of CO (28.01 g/mol) are produced as a by-product when 1.500*103 g SiO₂ reacts with excess (Ca₃PO₄)₂ and C? Assume 100% yield. 2 Ca₃ (PO₄ )₂ (s) + 6 Si O₂ (s) + 10 Cs) $\rightarrow$ P4 (s) + 6 CaSi O₃ (s) + 10 CO(g)

(Short Answer)

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Question 81

Chlorine atoms in the atmosphere can react with ozone.Mathematically combine the following two reactions to create an overall balanced equation with the lowest whole-number coefficients and select the statement that is FALSE.All chemical species in the reaction are gas-phase. Cl + O₃ $\rightarrow$ Cl O + O₂ Cl O + O $\rightarrow$ Cl + O₂

(Multiple Choice)

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Question 82

During a fermentation process, sucrose (C₁₂H₂₂O₁₁) can react with water to form ethanol (C₂H₅OH) and carbon dioxide gas.What is the sum of the coefficients in the balanced chemical equation?

(Multiple Choice)

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Question 83

A compound containing bromine and fluorine used in the production of UF₆ is 58.37% Br by mass.What is the empirical formula for the compound?

(Multiple Choice)

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Question 84

Chemical analysis of a natural organic compound important in the synthesis of cholesterol, steroids, and vitamin D in the human body is found to be 87.73% C and 12.27% H by mass.Mass spectrometry data give its molecular mass as 410 amu.How many empirical formula units are there in the molecular formula?

(Multiple Choice)

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Question 85

In a demonstration of the complete combustion of propane (C₃H₈) with oxygen (O₂), several balloons were prepared with various proportions by volume of propane and oxygen.The loudest explosion occurred for the balloon with the correct stoichiometric proportions of the gases.Which balloon had the loudest explosion?

(Multiple Choice)

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Question 86

What is the theoretical yield of iron (55.845 g/mol) when 10.0 g Fe ₂O₃ (159.69 g/mol) reacts with excess carbon (12.01 g/mol)? 2 Fe₂O₃ (s) + 3 C(s) $\rightarrow$ 4 Fe(s) + 3 CO₂ (g)

(Multiple Choice)

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Question 87

Aluminum can form clusters that behave similarly to certain atoms.The "superatom," Al₁₃, is thought to mimic chlorine.Suppose you create a process that generates KAl ₁₃ (389.86 g/mol) and oxygen gas from aluminum oxide (101.96 g/mol) and potassium metal.How many grams of KAl₁₃ could be produced by the reaction of 102 g of Al₂O₃? You will need to write a balanced chemical reaction.

(Multiple Choice)

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Question 88

Air bags in cars inflate when an electrical spark activates sodium azide (NaN ₃) so that it decomposes to sodium metal and nitrogen gas.In the balanced reaction equation, how many moles of N₂ gas are formed for each mole of NaN₃?

(Multiple Choice)

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Question 89

In addition to TiS, titanium forms a number of compounds with sulfur.Find the mass percent Ti in TiS, Ti₂S₃, and TiS₂ to two decimal places.

(Short Answer)

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Question 90

The acid-base reaction between phosphoric acid, H ₃PO₄, and calcium hydroxide, Ca(OH)₂, yields water and calcium phosphate.For each mole of calcium phosphate produced by this reaction, how many moles of water are produced?

(Multiple Choice)

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Question 91

Which of the following contains the largest number of atoms?

(Multiple Choice)

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Question 92

Elemental phosphorus (P₄) reacts vigorously with halogens at room temperature to produce phosphorus trihalides.How many grams of PF₃ (87.97 g/mol) can be produced using excess fluorine (38.00 g/mol) and 5.49 g P₄ (123.88 g/mol)? P ₄ (s) + 6 F₂ (g) $\rightarrow$ 4 PF₃ (g)

(Short Answer)

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Question 93

Which of the following statements regarding mass spectrometry is NOT true?

(Multiple Choice)

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Question 94

What are the stoichiometric coefficients for oxygen and water, respectively, in the balanced chemical reaction equation representing the combustion of butane (C ₄H₁₀)?

(Multiple Choice)

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Question 95

Which of the following samples contains the fewest number of molecules? H is used as the symbol for hydrogen-1, and D is used as the symbol for hydrogen-2.

(Multiple Choice)

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Question 96

Silver metal reacts with nitric acid to form aqueous silver nitrate nitrate, nitrogen monoxide gas, and water.Write the balanced chemical equation.Include states of matter.

(Essay)

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Question 97

Copper was the first metal to be produced from its ore because it is the easiest to smelt, that is, to refine by heating in the presence of carbon.The ore was likely malachite [Cu₂(OH)₂CO₃].What is the mass percent of copper in malachite?

(Multiple Choice)

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Question 98

Ammonia, NH₃, is industrially produced from N₂ and H₂ using the Haber process.How much ammonia can be produced from 28 kg of nitrogen and 2 kg of hydrogen, assuming the reaction yield is 90%?

(Multiple Choice)

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Question 99

Han purple, a synthetic inorganic pigment developed in China in ancient times, has the chemical formula BaCuSi₂O₆.What is its percent by mass silicon?

(Multiple Choice)

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Question 100

Showing 81 - 100 of 140

During a fermentation process, sucrose (C₁₂H₂₂O₁₁) can react with water to form ethanol (C₂H₅OH) and carbon dioxide gas.What is the sum of the coefficients in the balanced chemical equation?

A compound containing bromine and fluorine used in the production of UF₆ is 58.37% Br by mass.What is the empirical formula for the compound?

What is the theoretical yield of iron (55.845 g/mol) when 10.0 g Fe ₂O₃ (159.69 g/mol) reacts with excess carbon (12.01 g/mol)? 2 Fe₂O₃ (s) + 3 C(s) $\rightarrow$ 4 Fe(s) + 3 CO₂ (g)

Air bags in cars inflate when an electrical spark activates sodium azide (NaN ₃) so that it decomposes to sodium metal and nitrogen gas.In the balanced reaction equation, how many moles of N₂ gas are formed for each mole of NaN₃?

In addition to TiS, titanium forms a number of compounds with sulfur.Find the mass percent Ti in TiS, Ti₂S₃, and TiS₂ to two decimal places.

The acid-base reaction between phosphoric acid, H ₃PO₄, and calcium hydroxide, Ca(OH)₂, yields water and calcium phosphate.For each mole of calcium phosphate produced by this reaction, how many moles of water are produced?

Which of the following contains the largest number of atoms?

Elemental phosphorus (P₄) reacts vigorously with halogens at room temperature to produce phosphorus trihalides.How many grams of PF₃ (87.97 g/mol) can be produced using excess fluorine (38.00 g/mol) and 5.49 g P₄ (123.88 g/mol)? P ₄ (s) + 6 F₂ (g) $\rightarrow$ 4 PF₃ (g)

Which of the following statements regarding mass spectrometry is NOT true?

What are the stoichiometric coefficients for oxygen and water, respectively, in the balanced chemical reaction equation representing the combustion of butane (C ₄H₁₀)?

Which of the following samples contains the fewest number of molecules? H is used as the symbol for hydrogen-1, and D is used as the symbol for hydrogen-2.

Silver metal reacts with nitric acid to form aqueous silver nitrate nitrate, nitrogen monoxide gas, and water.Write the balanced chemical equation.Include states of matter.

Copper was the first metal to be produced from its ore because it is the easiest to smelt, that is, to refine by heating in the presence of carbon.The ore was likely malachite [Cu₂(OH)₂CO₃].What is the mass percent of copper in malachite?

Ammonia, NH₃, is industrially produced from N₂ and H₂ using the Haber process.How much ammonia can be produced from 28 kg of nitrogen and 2 kg of hydrogen, assuming the reaction yield is 90%?

Han purple, a synthetic inorganic pigment developed in China in ancient times, has the chemical formula BaCuSi₂O₆.What is its percent by mass silicon?

Matter and Energy an Atomic Perspective

Atoms, Ions, and Molecules the Building Blocks of Matter

Atomic Structure Explaining the Properties of Elements

Chemical Bonding Understanding Climate Change

Bonding Theories Explaining Molecular Geometry

Intermolecular Forces Attractions Between Particles

Aqueous Solutions Chemistry of the Hydrosphere

Thermochemistry Energy Changes in Chemical Reactions

Properties of Gases the Air We Breathe

Properties of Solutions Their Concentrations and Colligative Properties

Thermodynamics Why Chemical Reactions Happen

Chemical Kinetics Clearing the Air

Chemical Equilibrium Equal but Opposite Reaction Rates

Acid-Base Equilibria Proton Transfer in Biological Systems

Additional Aqueous Equilibria Chemistry and the Oceans

Electrochemistry the Quest for Clean Energy

The Solid State a Particulate View

Organic Chemistry Fuels, Pharmaceuticals, and Modern Materials

Biochemistry the Compounds of Life

Nuclear Chemistry the Risks and Benefits

The Main Group Elements Life and the Periodic Table

Transition Metals Biological and Medical Applications

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Exam 7: Stoichiometry Mass Relationships and Chemical Reactions

During a fermentation process, sucrose (C12H22O11) can react with water to form ethanol (C2H5OH) and carbon dioxide gas.What is the sum of the coefficients in the balanced chemical equation?

A compound containing bromine and fluorine used in the production of UF6 is 58.37% Br by mass.What is the empirical formula for the compound?

What is the theoretical yield of iron (55.845 g/mol) when 10.0 g Fe 2O3 (159.69 g/mol) reacts with excess carbon (12.01 g/mol)? 2 Fe2O3 (s) + 3 C(s) →\rightarrow→ 4 Fe(s) + 3 CO2 (g)

Air bags in cars inflate when an electrical spark activates sodium azide (NaN 3) so that it decomposes to sodium metal and nitrogen gas.In the balanced reaction equation, how many moles of N2 gas are formed for each mole of NaN3?

In addition to TiS, titanium forms a number of compounds with sulfur.Find the mass percent Ti in TiS, Ti2S3, and TiS2 to two decimal places.

The acid-base reaction between phosphoric acid, H 3PO4, and calcium hydroxide, Ca(OH)2, yields water and calcium phosphate.For each mole of calcium phosphate produced by this reaction, how many moles of water are produced?

Which of the following contains the largest number of atoms?

Elemental phosphorus (P4) reacts vigorously with halogens at room temperature to produce phosphorus trihalides.How many grams of PF3 (87.97 g/mol) can be produced using excess fluorine (38.00 g/mol) and 5.49 g P4 (123.88 g/mol)? P 4 (s) + 6 F2 (g) →\rightarrow→ 4 PF3 (g)

Which of the following statements regarding mass spectrometry is NOT true?

What are the stoichiometric coefficients for oxygen and water, respectively, in the balanced chemical reaction equation representing the combustion of butane (C 4H10)?

Which of the following samples contains the fewest number of molecules? H is used as the symbol for hydrogen-1, and D is used as the symbol for hydrogen-2.

Silver metal reacts with nitric acid to form aqueous silver nitrate nitrate, nitrogen monoxide gas, and water.Write the balanced chemical equation.Include states of matter.

Copper was the first metal to be produced from its ore because it is the easiest to smelt, that is, to refine by heating in the presence of carbon.The ore was likely malachite [Cu2(OH)2CO3].What is the mass percent of copper in malachite?

Ammonia, NH3, is industrially produced from N2 and H2 using the Haber process.How much ammonia can be produced from 28 kg of nitrogen and 2 kg of hydrogen, assuming the reaction yield is 90%?

Han purple, a synthetic inorganic pigment developed in China in ancient times, has the chemical formula BaCuSi2O6.What is its percent by mass silicon?

Matter and Energy an Atomic Perspective

Atoms, Ions, and Molecules the Building Blocks of Matter

Atomic Structure Explaining the Properties of Elements

Chemical Bonding Understanding Climate Change

Bonding Theories Explaining Molecular Geometry

Intermolecular Forces Attractions Between Particles

Aqueous Solutions Chemistry of the Hydrosphere

Thermochemistry Energy Changes in Chemical Reactions

Properties of Gases the Air We Breathe

Properties of Solutions Their Concentrations and Colligative Properties

Thermodynamics Why Chemical Reactions Happen

Chemical Kinetics Clearing the Air

Chemical Equilibrium Equal but Opposite Reaction Rates

Acid-Base Equilibria Proton Transfer in Biological Systems

Additional Aqueous Equilibria Chemistry and the Oceans

Electrochemistry the Quest for Clean Energy

The Solid State a Particulate View

Organic Chemistry Fuels, Pharmaceuticals, and Modern Materials

Biochemistry the Compounds of Life

Nuclear Chemistry the Risks and Benefits

The Main Group Elements Life and the Periodic Table

Transition Metals Biological and Medical Applications

Filters

During a fermentation process, sucrose (C₁₂H₂₂O₁₁) can react with water to form ethanol (C₂H₅OH) and carbon dioxide gas.What is the sum of the coefficients in the balanced chemical equation?

A compound containing bromine and fluorine used in the production of UF₆ is 58.37% Br by mass.What is the empirical formula for the compound?

What is the theoretical yield of iron (55.845 g/mol) when 10.0 g Fe ₂O₃ (159.69 g/mol) reacts with excess carbon (12.01 g/mol)? 2 Fe₂O₃ (s) + 3 C(s) $\rightarrow$ 4 Fe(s) + 3 CO₂ (g)

Air bags in cars inflate when an electrical spark activates sodium azide (NaN ₃) so that it decomposes to sodium metal and nitrogen gas.In the balanced reaction equation, how many moles of N₂ gas are formed for each mole of NaN₃?

In addition to TiS, titanium forms a number of compounds with sulfur.Find the mass percent Ti in TiS, Ti₂S₃, and TiS₂ to two decimal places.

The acid-base reaction between phosphoric acid, H ₃PO₄, and calcium hydroxide, Ca(OH)₂, yields water and calcium phosphate.For each mole of calcium phosphate produced by this reaction, how many moles of water are produced?

Elemental phosphorus (P₄) reacts vigorously with halogens at room temperature to produce phosphorus trihalides.How many grams of PF₃ (87.97 g/mol) can be produced using excess fluorine (38.00 g/mol) and 5.49 g P₄ (123.88 g/mol)? P ₄ (s) + 6 F₂ (g) $\rightarrow$ 4 PF₃ (g)

What are the stoichiometric coefficients for oxygen and water, respectively, in the balanced chemical reaction equation representing the combustion of butane (C ₄H₁₀)?

Copper was the first metal to be produced from its ore because it is the easiest to smelt, that is, to refine by heating in the presence of carbon.The ore was likely malachite [Cu₂(OH)₂CO₃].What is the mass percent of copper in malachite?

Ammonia, NH₃, is industrially produced from N₂ and H₂ using the Haber process.How much ammonia can be produced from 28 kg of nitrogen and 2 kg of hydrogen, assuming the reaction yield is 90%?

Han purple, a synthetic inorganic pigment developed in China in ancient times, has the chemical formula BaCuSi₂O₆.What is its percent by mass silicon?