Question 1

How many protons are there in a molecule of adrenaline (C9H13NO3), a neurotransmitter and hormone?

Accepted Answer

A) 22 
B) 26 
C) 43 
D) 98 
E) 183 
A) 22 
B) 26 
C) 43 
D) 98 
E) 183

Question 2

A single atom of hydrogen has a mass of 1.0 amu, while a mole of hydrogen atoms has a mass of 1.0 g. Select the correct conversion factor between atomic mass units and grams.

Accepted Answer

A) 1 amu = 1 g exactly 
B) 1 amu = 6.0 × 10 23 g 
C) 1 g = 6.0 × 10 23 amu 
D) 1 g = 1.7 × 10 −24 amu 
E) None of these choices are correct. 
A) 1 amu = 1 g exactly 
B) 1 amu = 6.0 × 10 23 g 
C) 1 g = 6.0 × 10 23 amu 
D) 1 g = 1.7 × 10 −24 amu 
E) None of these choices are correct.

Question 3

Calculate the molar mass of (NH4)3AsO4.

Accepted Answer

A) 417.80 g/mol 
B) 193.03 g/mol 
C) 165.02 g/mol 
D) 156.96 g/mol 
E) 108.96 g/mol 
A) 417.80 g/mol 
B) 193.03 g/mol 
C) 165.02 g/mol 
D) 156.96 g/mol 
E) 108.96 g/mol

Question 4

Magnesium fluoride is used in the ceramics and glass industry. What is the mass of 1.72 mol of magnesium fluoride?

Accepted Answer

A) 43.3 g 
B) 62.3 g 
C) 74.5 g 
D) 92.9 g 
E) 107 g 
A) 43.3 g 
B) 62.3 g 
C) 74.5 g 
D) 92.9 g 
E) 107 g

Question 5

Which of the following samples has the most moles of the compound?

Accepted Answer

A) 50.0 g of Li 2O 
B) 75.0 g of CaO 
C) 200.0 g of Fe 2O 3 
D) 50.0 g of CO 2 
E) 100.0 g of SO 3 
A) 50.0 g of Li 2O 
B) 75.0 g of CaO 
C) 200.0 g of Fe 2O 3 
D) 50.0 g of CO 2 
E) 100.0 g of SO 3

Question 6

How many grams of sodium fluoride (used in water fluoridation and manufacture of insecticides) are needed to form 485 g of sulfur tetrafluoride? 3SCl2(l) + 4NaF(s) → SF4(g) + S2Cl2(l) + 4NaCl(s)

Accepted Answer

A) 1940 g 
B) 1510 g 
C) 754 g 
D) 205 g 
E) 51.3 g 
A) 1940 g 
B) 1510 g 
C) 754 g 
D) 205 g 
E) 51.3 g

Question 7

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

Accepted Answer

A) UO 2( s)+ 2HF( l)→ UF 4( s)+ H 2O( l) 
B) UO 2( s)+ 4HF( l)→ UF 4( s)+ 2H 2O( l) 
C) UO 2 ( s)+ H 4F 4( l)→ UF 4 ( s)+ H 4O 2( l) 
D) UO 2( s)+ 4HF( l)→ UF 4( s)+ 4H 2O( l) 
E) UO 2( s)+ 8HF( l)→ 2UF 4( s)+ 4H 2O( l) 
A) UO 2( s)+ 2HF( l)→ UF 4( s)+ H 2O( l) 
B) UO 2( s)+ 4HF( l)→ UF 4( s)+ 2H 2O( l) 
C) UO 2 ( s)+ H 4F 4( l)→ UF 4 ( s)+ H 4O 2( l) 
D) UO 2( s)+ 4HF( l)→ UF 4( s)+ 4H 2O( l) 
E) UO 2( s)+ 8HF( l)→ 2UF 4( s)+ 4H 2O( l)

Question 8

Sodium bromate is used in a mixture which dissolves gold from its ores. Calculate the mass in grams of 4.68 mol of sodium bromate.

Accepted Answer

A) 706 g 
B) 482 g 
C) 383 g 
D) 32.2 g 
E) 0.0310 g 
A) 706 g 
B) 482 g 
C) 383 g 
D) 32.2 g 
E) 0.0310 g

Question 9

Copper(II) sulfate pentahydrate, CuSO4·5H2O, is used as a fungicide and algicide. Calculate the mass of oxygen in 1.000 mol of CuSO4·5H2O.

Accepted Answer

A) 249.7 g 
B) 144.0 g 
C) 96.00 g 
D) 80.00 g 
E) 64.00 g 
A) 249.7 g 
B) 144.0 g 
C) 96.00 g 
D) 80.00 g 
E) 64.00 g

Question 10

Aluminum metal reacts with chlorine gas to form solid aluminum trichloride, AlCl3. What mass of chlorine gas is needed to react completely with 163 g of aluminum?

Accepted Answer

A) 214 g 
B) 245 g 
C) 321 g 
D) 489 g 
E) 643 g 
A) 214 g 
B) 245 g 
C) 321 g 
D) 489 g 
E) 643 g

Question 11

Which of the following samples contains the greatest total number atoms?

Accepted Answer

A) 50.0 g of Li 2O 
B) 75.0 g of CaO 
C) 200.0 g of Fe 2O 3 
D) 50.0 g of CO 2 
E) 100.0 g of SO 3 
A) 50.0 g of Li 2O 
B) 75.0 g of CaO 
C) 200.0 g of Fe 2O 3 
D) 50.0 g of CO 2 
E) 100.0 g of SO 3

Question 12

In the combustion analysis of 0.1127 g of glucose (C6H12O6), what mass, in grams, of CO2 would be produced?

Accepted Answer

A) 0.0451 g 
B) 0.0825 g 
C) 0.1652 g 
D) 0.4132 g 
E) 1.466 g 
A) 0.0451 g 
B) 0.0825 g 
C) 0.1652 g 
D) 0.4132 g 
E) 1.466 g

How many protons are there in a molecule of adrenaline (C₉H₁₃NO₃), a neurotransmitter and hormone?

A single atom of hydrogen has a mass of 1.0 amu, while a mole of hydrogen atoms has a mass of 1.0 g. Select the correct conversion factor between atomic mass units and grams.

Calculate the molar mass of (NH₄)₃AsO₄.

Magnesium fluoride is used in the ceramics and glass industry. What is the mass of 1.72 mol of magnesium fluoride?

Which of the following samples has the most moles of the compound?

How many grams of sodium fluoride (used in water fluoridation and manufacture of insecticides) are needed to form 485 g of sulfur tetrafluoride? 3SCl₂(l) + 4NaF(s) → SF₄(g) + S₂Cl₂(l) + 4NaCl(s)

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

Sodium bromate is used in a mixture which dissolves gold from its ores. Calculate the mass in grams of 4.68 mol of sodium bromate.

Copper(II) sulfate pentahydrate, CuSO₄·5H₂O, is used as a fungicide and algicide. Calculate the mass of oxygen in 1.000 mol of CuSO₄·5H₂O.

Aluminum metal reacts with chlorine gas to form solid aluminum trichloride, AlCl₃. What mass of chlorine gas is needed to react completely with 163 g of aluminum?

Which of the following samples contains the greatest total number atoms?

In the combustion analysis of 0.1127 g of glucose (C₆H₁₂O₆), what mass, in grams, of CO₂ would be produced?

Keys to the Study of Chemistry: Definitions, Units, and Problem Solving

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 Reaction Direction

Electrochemistry: Chemical Change and Electrical Work

The Elements in Nature and Industry

Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

Filters

Exam 3: Stoichiometry of Formulas and Equations

How many protons are there in a molecule of adrenaline (C9H13NO3), a neurotransmitter and hormone?

A single atom of hydrogen has a mass of 1.0 amu, while a mole of hydrogen atoms has a mass of 1.0 g. Select the correct conversion factor between atomic mass units and grams.

Calculate the molar mass of (NH4)3AsO4.

Magnesium fluoride is used in the ceramics and glass industry. What is the mass of 1.72 mol of magnesium fluoride?

Which of the following samples has the most moles of the compound?

How many grams of sodium fluoride (used in water fluoridation and manufacture of insecticides) are needed to form 485 g of sulfur tetrafluoride? 3SCl2(l) + 4NaF(s) → SF4(g) + S2Cl2(l) + 4NaCl(s)

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

Sodium bromate is used in a mixture which dissolves gold from its ores. Calculate the mass in grams of 4.68 mol of sodium bromate.

Copper(II) sulfate pentahydrate, CuSO4·5H2O, is used as a fungicide and algicide. Calculate the mass of oxygen in 1.000 mol of CuSO4·5H2O.

Aluminum metal reacts with chlorine gas to form solid aluminum trichloride, AlCl3. What mass of chlorine gas is needed to react completely with 163 g of aluminum?

Which of the following samples contains the greatest total number atoms?

In the combustion analysis of 0.1127 g of glucose (C6H12O6), what mass, in grams, of CO2 would be produced?

Keys to the Study of Chemistry: Definitions, Units, and Problem Solving

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 Reaction Direction

Electrochemistry: Chemical Change and Electrical Work

The Elements in Nature and Industry

Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

Filters

How many protons are there in a molecule of adrenaline (C₉H₁₃NO₃), a neurotransmitter and hormone?

Calculate the molar mass of (NH₄)₃AsO₄.

How many grams of sodium fluoride (used in water fluoridation and manufacture of insecticides) are needed to form 485 g of sulfur tetrafluoride? 3SCl₂(l) + 4NaF(s) → SF₄(g) + S₂Cl₂(l) + 4NaCl(s)

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

Copper(II) sulfate pentahydrate, CuSO₄·5H₂O, is used as a fungicide and algicide. Calculate the mass of oxygen in 1.000 mol of CuSO₄·5H₂O.

Aluminum metal reacts with chlorine gas to form solid aluminum trichloride, AlCl₃. What mass of chlorine gas is needed to react completely with 163 g of aluminum?

In the combustion analysis of 0.1127 g of glucose (C₆H₁₂O₆), what mass, in grams, of CO₂ would be produced?