How many grams of oxygen are needed to react completely with 200.0 g of ammonia, NH3? 4NH3(g) + 5O2(g) $\rightarrow$ 4NO(g) + 6H2O(g)

A) 469.7 g B) 300.6 g C) 250.0 g D) 3.406 g E) 2.180 g A) 469.7 g B) 300.6 g C) 250.0 g D) 3.406 g E) 2.180 g

How many molecules of molecular oxygen react with four molecules of NH3 to form four molecules of nitrogen monoxide and six molecules of water?

A) 2 B) 10 C) 3 D) 4 E) 5 A) 2 B) 10 C) 3 D) 4 E) 5

An important reaction sequence in the industrial production of nitric acid is the following: N2(g) + 3H2(g) $\rightarrow$ 2NH3(g) 4NH3(g) + 5O2(g) $\rightarrow$ 4NO(g) + 6H2O(l) Starting from 20.0 mol of nitrogen gas in the first reaction, how many moles of oxygen gas are required in the second one?

A) 12.5 mol O2 B) 20.0 mol O2 C) 25.0 mol O2 D) 50.0 mol O2 E) 100. mol O2 A) 12.5 mol O2 B) 20.0 mol O2 C) 25.0 mol O2 D) 50.0 mol O2 E) 100. mol O2

What is the percent yield for the reaction PCl3(g) + Cl2(g) $\rightarrow$ PCl5(g) if 119.3 g of PCl5 (? = 208.2 g/mol) are formed when 61.3 g of Cl2 (? = 70.91 g/mol) react with excess PCl3?

A) 195% B) 85.0% C) 66.3% D) 51.4% E) 43.7% A) 195% B) 85.0% C) 66.3% D) 51.4% E) 43.7%

The number of hydrogen atoms in 0.050 mol of C3H8O3 is

A) 3.0 * 1022 H atoms B) 1.2 * 1023 H atoms C) 2.4 *1023 H atoms D) 4.8 * 1023 H atoms E) None of these choices is correct. A) 3.0 * 1022 H atoms B) 1.2 * 1023 H atoms C) 2.4 *1023 H atoms D) 4.8 * 1023 H atoms E) None of these choices is correct.

Methanol (CH4O) is converted to bromomethane (CH3Br) as follows: CH4O + HBr $\rightarrow$CH3Br + H2O If 12.23 g of bromomethane are produced when 5.00 g of methanol is reacted with excess HBr, what is the percentage yield?

A) 40.9% B) 82.6% C) 100.% D) 121% E) 245% A) 40.9% B) 82.6% C) 100.% D) 121% E) 245%

Balance the following equation: UO2(s) + HF(l) $\rightarrow$UF4(s) + H2O(l)

A) UO2(s) + 2HF(l) $\rightarrow$ UF4(s) + H2O(l) B) UO2(s) + 4HF(l) $\rightarrow$ UF4(s) + 2H2O(l) C) UO2 (s) + H4F4(l) $\rightarrow$UF4 (s) + H4O2(l) D) UO2(s) + 4HF(l) $\rightarrow$ UF4(s) + 4H2O(l) E) UO2(s) + 8HF(l) $\rightarrow$ 2UF4(s) + 4H2O(l) A) UO2(s) + 2HF(l) $\rightarrow$ UF4(s) + H2O(l) B) UO2(s) + 4HF(l) $\rightarrow$ UF4(s) + 2H2O(l) C) UO2 (s) + H4F4(l) $\rightarrow$UF4 (s) + H4O2(l) D) UO2(s) + 4HF(l) $\rightarrow$ UF4(s) + 4H2O(l) E) UO2(s) + 8HF(l) $\rightarrow$ 2UF4(s) + 4H2O(l)

Magnesium reacts with iron(III) chloride to form magnesium chloride (which can be used in fireproofing wood and in disinfectants) and iron. 3Mg(s) + 2FeCl3(s) $\rightarrow$ 3MgCl2(s) + 2Fe(s) A mixture of 41.0 g of magnesium (? = 24.31 g/mol) and 175 g of iron(III) chloride (? = 162.2 g/mol) is allowed to react. What mass of magnesium chloride = 95.21 g/mol) is formed?

A) 68.5 g MgCl2 B) 77.0 g MgCl2 C) 71.4 g MgCl2 D) 107 g MgCl2 E) 154 g MgCl2 A) 68.5 g MgCl2 B) 77.0 g MgCl2 C) 71.4 g MgCl2 D) 107 g MgCl2 E) 154 g MgCl2

Exam 3: Stoichiometry of Formulas and Equations

Sulfur dioxide reacts with chlorine to produce thionyl chloride (used as a drying agent for inorganic halides) and dichlorine oxide (used as a bleach for wood, pulp and textiles). SO₂(g) + 2Cl₂(g) $\rightarrow$ SOCl₂(g) + Cl₂O(g) If 0.400 mol of Cl₂ reacts with excess SO₂, how many moles of Cl₂O are formed?

(Multiple Choice)

4.9/5

(46)

Question 41

A 0.150 M sodium chloride solution is referred to as a physiological saline solution because it has the same concentration of salts as normal human blood. Calculate the mass of solute needed to prepare 275.0 mL of a physiological saline solution.

(Multiple Choice)

5.0/5

(39)

Question 42

How many grams of oxygen are needed to react completely with 200.0 g of ammonia, NH₃? 4NH₃(g) + 5O₂(g) $\rightarrow$ 4NO(g) + 6H₂O(g)

(Multiple Choice)

4.8/5

(39)

Question 43

The formula CH₃O_0.5 is an example of an empirical formula.

(True/False)

4.9/5

(41)

Question 44

In combustion analysis, the oxygen content of a substance is equal to the total oxygen in the CO₂ and H₂O collected in the absorbers.

(True/False)

4.8/5

(25)

Question 45

Potassium chloride is used as a substitute for sodium chloride for individuals with high blood pressure. Identify the limiting reactant and determine the mass of the excess reactant remaining when 7.00 g of chlorine gas reacts with 5.00 g of potassium to form potassium chloride.

(Multiple Choice)

4.7/5

(33)

Question 46

Analysis of a white solid produced in a reaction between chlorine and phosphorus showed that it contained 77.44% chlorine and 22.56% phosphorus. What is its empirical formula?

(Short Answer)

4.8/5

(32)

Question 47

Ammonia will react with fluorine to produce dinitrogen tetrafluoride and hydrogen fluoride (used in production of aluminum, in uranium processing, and in frosting of light bulbs). 2NH₃(g) + 5F₂(g) $\rightarrow$ N₂F₄(g) + 6HF(g) How many moles of NH₃ are needed to react completely with 13.6 mol of F₂?

(Multiple Choice)

4.9/5

(41)

Question 48

Aluminum sulfate, Al₂(SO₄)₃, is used in tanning leather, purifying water, and manufacture of antiperspirants. Calculate its molar mass.

(Multiple Choice)

4.9/5

(34)

Question 49

Hydroxylamine hydrochloride is a powerful reducing agent which is used as a polymerization catalyst. It contains 5.80 mass % H, 20.16 mass % N, 23.02 mass % O, and 51.02 mass % Cl. What is its empirical formula?

(Multiple Choice)

4.8/5

(50)

Question 50

What will be the final volume of a solution prepared by diluting 25 mL of 8.25 M sodium hydroxide to a concentration of 2.40 M?

(Multiple Choice)

4.8/5

(37)

Question 51

How many molecules of molecular oxygen react with four molecules of NH₃ to form four molecules of nitrogen monoxide and six molecules of water?

(Multiple Choice)

4.8/5

(45)

Question 52

An important reaction sequence in the industrial production of nitric acid is the following: N₂(g) + 3H₂(g) $\rightarrow$ 2NH₃(g) 4NH₃(g) + 5O₂(g) $\rightarrow$ 4NO(g) + 6H₂O(l) Starting from 20.0 mol of nitrogen gas in the first reaction, how many moles of oxygen gas are required in the second one?

(Multiple Choice)

4.9/5

(35)

Question 53

What is the percent yield for the reaction PCl₃(g) + Cl₂(g) $\rightarrow$ PCl₅(g) if 119.3 g of PCl₅ (? = 208.2 g/mol) are formed when 61.3 g of Cl₂ (? = 70.91 g/mol) react with excess PCl₃?

(Multiple Choice)

4.8/5

(35)

Question 54

When 2.61 g of solid Na₂CO₃ is dissolved in sufficient water to make 250. mL of solution, the concentration of Na₂CO₃ is:

(Multiple Choice)

4.9/5

(41)

Question 55

A normal breath takes in about 1.0 L of air. Assuming that air has an average molar mass of 28.8 g, and that its density is 0.97 g/L, how many molecules of air do you take in with each breath?

(Multiple Choice)

5.0/5

(37)

Question 56

The number of hydrogen atoms in 0.050 mol of C₃H₈O₃ is

(Multiple Choice)

4.9/5

(50)

Question 57

Methanol (CH₄O) is converted to bromomethane (CH₃Br) as follows: CH₄O + HBr $\rightarrow$ CH₃Br + H₂O If 12.23 g of bromomethane are produced when 5.00 g of methanol is reacted with excess HBr, what is the percentage yield?

(Multiple Choice)

4.8/5

(33)

Question 58

Balance the following equation: UO₂(s) + HF(l) $\rightarrow$ UF₄(s) + H₂O(l)

(Multiple Choice)

4.7/5

(33)

Question 59

Magnesium reacts with iron(III) chloride to form magnesium chloride (which can be used in fireproofing wood and in disinfectants) and iron. 3Mg(s) + 2FeCl₃(s) $\rightarrow$ 3MgCl₂(s) + 2Fe(s) A mixture of 41.0 g of magnesium (? = 24.31 g/mol) and 175 g of iron(III) chloride (? = 162.2 g/mol) is allowed to react. What mass of magnesium chloride = 95.21 g/mol) is formed?

(Multiple Choice)

5.0/5

(28)

Question 60

Showing 41 - 60 of 96

A 0.150 M sodium chloride solution is referred to as a physiological saline solution because it has the same concentration of salts as normal human blood. Calculate the mass of solute needed to prepare 275.0 mL of a physiological saline solution.

How many grams of oxygen are needed to react completely with 200.0 g of ammonia, NH₃? 4NH₃(g) + 5O₂(g) $\rightarrow$ 4NO(g) + 6H₂O(g)

The formula CH₃O_0.5 is an example of an empirical formula.

In combustion analysis, the oxygen content of a substance is equal to the total oxygen in the CO₂ and H₂O collected in the absorbers.

Potassium chloride is used as a substitute for sodium chloride for individuals with high blood pressure. Identify the limiting reactant and determine the mass of the excess reactant remaining when 7.00 g of chlorine gas reacts with 5.00 g of potassium to form potassium chloride.

Analysis of a white solid produced in a reaction between chlorine and phosphorus showed that it contained 77.44% chlorine and 22.56% phosphorus. What is its empirical formula?

Aluminum sulfate, Al₂(SO₄)₃, is used in tanning leather, purifying water, and manufacture of antiperspirants. Calculate its molar mass.

Hydroxylamine hydrochloride is a powerful reducing agent which is used as a polymerization catalyst. It contains 5.80 mass % H, 20.16 mass % N, 23.02 mass % O, and 51.02 mass % Cl. What is its empirical formula?

What will be the final volume of a solution prepared by diluting 25 mL of 8.25 M sodium hydroxide to a concentration of 2.40 M?

How many molecules of molecular oxygen react with four molecules of NH₃ to form four molecules of nitrogen monoxide and six molecules of water?

What is the percent yield for the reaction PCl₃(g) + Cl₂(g) $\rightarrow$ PCl₅(g) if 119.3 g of PCl₅ (? = 208.2 g/mol) are formed when 61.3 g of Cl₂ (? = 70.91 g/mol) react with excess PCl₃?

When 2.61 g of solid Na₂CO₃ is dissolved in sufficient water to make 250. mL of solution, the concentration of Na₂CO₃ is:

A normal breath takes in about 1.0 L of air. Assuming that air has an average molar mass of 28.8 g, and that its density is 0.97 g/L, how many molecules of air do you take in with each breath?

The number of hydrogen atoms in 0.050 mol of C₃H₈O₃ is

Methanol (CH₄O) is converted to bromomethane (CH₃Br) as follows: CH₄O + HBr $\rightarrow$ CH₃Br + H₂O If 12.23 g of bromomethane are produced when 5.00 g of methanol is reacted with excess HBr, what is the percentage yield?

Balance the following equation: UO₂(s) + HF(l) $\rightarrow$ UF₄(s) + H₂O(l)

Keys to the Study of Chemistry

The Components of Matter

Three Major Classes of Chemical Reactions

Gases and the Kinetic-Molecular Theory

Thermochemistry: Energy Flow and Chemical Change

Quantum Theory and Atomic Structure

Electron Configuration and Chemical Periodicity

Models of Chemical Bonding

The Shapes of Molecules

Theories of Covalent Bonding

Intermolecular Forces: Liquids, Solids, and Phase Changes

The Properties of Mixtures: Solutions and Colloids

Periodic Patterns in the Main-Group Elements

Organic Compounds and the Atomic Properties of Carbon

Kinetics: Rates and Mechanisms of Chemical Reactions

Equilibrium: the Extent of Chemical Reactions

Acid-Base Equilibria

Ionic Equilibria in Aqueous Systems

Thermodynamics: Entropy, Free Energy, and the Direction of Chemical Reactions

Electrochemistry: Chemical Change and Electrical Work

The Elements in Nature and Industry

The Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

Filters

Exam 3: Stoichiometry of Formulas and Equations

A 0.150 M sodium chloride solution is referred to as a physiological saline solution because it has the same concentration of salts as normal human blood. Calculate the mass of solute needed to prepare 275.0 mL of a physiological saline solution.

How many grams of oxygen are needed to react completely with 200.0 g of ammonia, NH3? 4NH3(g) + 5O2(g) →\rightarrow→ 4NO(g) + 6H2O(g)

The formula CH3O0.5 is an example of an empirical formula.

In combustion analysis, the oxygen content of a substance is equal to the total oxygen in the CO2 and H2O collected in the absorbers.

Potassium chloride is used as a substitute for sodium chloride for individuals with high blood pressure. Identify the limiting reactant and determine the mass of the excess reactant remaining when 7.00 g of chlorine gas reacts with 5.00 g of potassium to form potassium chloride.

Analysis of a white solid produced in a reaction between chlorine and phosphorus showed that it contained 77.44% chlorine and 22.56% phosphorus. What is its empirical formula?

Aluminum sulfate, Al2(SO4)3, is used in tanning leather, purifying water, and manufacture of antiperspirants. Calculate its molar mass.

Hydroxylamine hydrochloride is a powerful reducing agent which is used as a polymerization catalyst. It contains 5.80 mass % H, 20.16 mass % N, 23.02 mass % O, and 51.02 mass % Cl. What is its empirical formula?

What will be the final volume of a solution prepared by diluting 25 mL of 8.25 M sodium hydroxide to a concentration of 2.40 M?

How many molecules of molecular oxygen react with four molecules of NH3 to form four molecules of nitrogen monoxide and six molecules of water?

What is the percent yield for the reaction PCl3(g) + Cl2(g) →\rightarrow→ PCl5(g) if 119.3 g of PCl5 (? = 208.2 g/mol) are formed when 61.3 g of Cl2 (? = 70.91 g/mol) react with excess PCl3?

When 2.61 g of solid Na2CO3 is dissolved in sufficient water to make 250. mL of solution, the concentration of Na2CO3 is:

A normal breath takes in about 1.0 L of air. Assuming that air has an average molar mass of 28.8 g, and that its density is 0.97 g/L, how many molecules of air do you take in with each breath?

The number of hydrogen atoms in 0.050 mol of C3H8O3 is

Methanol (CH4O) is converted to bromomethane (CH3Br) as follows: CH4O + HBr →\rightarrow→ CH3Br + H2O If 12.23 g of bromomethane are produced when 5.00 g of methanol is reacted with excess HBr, what is the percentage yield?

Balance the following equation: UO2(s) + HF(l) →\rightarrow→ UF4(s) + H2O(l)

Keys to the Study of Chemistry

The Components of Matter

Three Major Classes of Chemical Reactions

Gases and the Kinetic-Molecular Theory

Thermochemistry: Energy Flow and Chemical Change

Quantum Theory and Atomic Structure

Electron Configuration and Chemical Periodicity

Models of Chemical Bonding

The Shapes of Molecules

Theories of Covalent Bonding

Intermolecular Forces: Liquids, Solids, and Phase Changes

The Properties of Mixtures: Solutions and Colloids

Periodic Patterns in the Main-Group Elements

Organic Compounds and the Atomic Properties of Carbon

Kinetics: Rates and Mechanisms of Chemical Reactions

Equilibrium: the Extent of Chemical Reactions

Acid-Base Equilibria

Ionic Equilibria in Aqueous Systems

Thermodynamics: Entropy, Free Energy, and the Direction of Chemical Reactions

Electrochemistry: Chemical Change and Electrical Work

The Elements in Nature and Industry

The Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

Filters

How many grams of oxygen are needed to react completely with 200.0 g of ammonia, NH₃? 4NH₃(g) + 5O₂(g) $\rightarrow$ 4NO(g) + 6H₂O(g)

The formula CH₃O_0.5 is an example of an empirical formula.

In combustion analysis, the oxygen content of a substance is equal to the total oxygen in the CO₂ and H₂O collected in the absorbers.

Aluminum sulfate, Al₂(SO₄)₃, is used in tanning leather, purifying water, and manufacture of antiperspirants. Calculate its molar mass.

How many molecules of molecular oxygen react with four molecules of NH₃ to form four molecules of nitrogen monoxide and six molecules of water?

What is the percent yield for the reaction PCl₃(g) + Cl₂(g) $\rightarrow$ PCl₅(g) if 119.3 g of PCl₅ (? = 208.2 g/mol) are formed when 61.3 g of Cl₂ (? = 70.91 g/mol) react with excess PCl₃?

When 2.61 g of solid Na₂CO₃ is dissolved in sufficient water to make 250. mL of solution, the concentration of Na₂CO₃ is:

The number of hydrogen atoms in 0.050 mol of C₃H₈O₃ is

Methanol (CH₄O) is converted to bromomethane (CH₃Br) as follows: CH₄O + HBr $\rightarrow$ CH₃Br + H₂O If 12.23 g of bromomethane are produced when 5.00 g of methanol is reacted with excess HBr, what is the percentage yield?

Balance the following equation: UO₂(s) + HF(l) $\rightarrow$ UF₄(s) + H₂O(l)