Question 1

How many moles of hydrogen atoms are there in 3 moles of codeine (C18H21NO3)?

Accepted Answer

A)  3 moles 
B)  21 moles 
C)  36 moles 
D)  54 moles 
E)  63 moles 
A)  3 moles 
B)  21 moles 
C)  36 moles 
D)  54 moles 
E)  63 moles

Question 2

Which of these is the correct name for NaHCO3?

Accepted Answer

A)  Sodium carbonate 
B)  Sodium trioxide 
C)  Sodium monocarbide 
D)  Sodium bicarbonate 
E)  Sodium carbide oxide 
A)  Sodium carbonate 
B)  Sodium trioxide 
C)  Sodium monocarbide 
D)  Sodium bicarbonate 
E)  Sodium carbide oxide

Question 3

How many grams of carbon dioxide are produced when 18.5 moles of oxygen react with excess acetylene according to the given equation?
​
2 C2H2 + 5 O2(g) → 4 CO2 + 2 H2O

Accepted Answer

A)  2,030 grams 
B)  814 grams 
C)  651.2 grams 
D)  88.0 grams 
E)  37.0 grams 
A)  2,030 grams 
B)  814 grams 
C)  651.2 grams 
D)  88.0 grams 
E)  37.0 grams

Question 4

A tiny amount of magnesium chloride contains 150 magnesium ions and 300 chloride ions. The correct formula for magnesium chloride is _____.

Accepted Answer

A)  MgCl 
B)  Mg2Cl 
C)  MgCl2 
D)  Mg150Cl300 
E)  Mg 2 Cl2 
A)  MgCl 
B)  Mg2Cl 
C)  MgCl2 
D)  Mg150Cl300 
E)  Mg 2 Cl2

Question 5

Calculate the number of oxygen atoms in 45.0 g of Co2(SO4)3 (molar mass of Co  2  (SO  4  )  3  = 405.8 g/mole).

Accepted Answer

A)  8.01 × 1023 atoms 
B)  2.67 × 1023 atoms 
C)  12.0 atoms 
D)  6.68 × 1022 atoms 
E)  1.07 × 1024 atoms 
A)  8.01 × 1023 atoms 
B)  2.67 × 1023 atoms 
C)  12.0 atoms 
D)  6.68 × 1022 atoms 
E)  1.07 × 1024 atoms

Question 6

Consider the reaction:  4 NH3 + 5 O2 → 6 H2O + 4 NO
If 125.0 g of NH3 reacts with 225.0 g of O2, how many grams of NH3 will be present after a complete reaction?

Accepted Answer

A)  0 grams 
B)  29.4 grams 
C)  95.6 grams 
D)  125.0 grams 
E)  152.5 grams 
A)  0 grams 
B)  29.4 grams 
C)  95.6 grams 
D)  125.0 grams 
E)  152.5 grams

Question 7

In the following equation, what is the coefficient of sodium nitride   when the equation is balanced?
 
_____ Na  3  N → _____ Na(s) + _____  N 2 (g)

Accepted Answer

A)  0 
B)  1 
C)  2 
D)  3 
E)  4 
A)  0 
B)  1 
C)  2 
D)  3 
E)  4

Question 8

How many grams of nitrogen dioxide are required to produce 260 grams of nitrogen monoxide?
3 NO2 + H2O → 2 HNO3 + NO

Accepted Answer

A)  8.67 grams 
B)  56.52 grams 
C)  132 grams 
D)  399 grams 
E)  1196 grams 
A)  8.67 grams 
B)  56.52 grams 
C)  132 grams 
D)  399 grams 
E)  1196 grams

Question 9

A tiny crystal of sodium chloride contains 5,000,000 sodium ions and 5,000,000 chloride ions. The correct formula for sodium chloride is _____.

Accepted Answer

A)  NaCl 
B)  Na5Cl5 
C)  Na50Cl50 
D)  NaCl2 
E)  None of these 
A)  NaCl 
B)  Na5Cl5 
C)  Na50Cl50 
D)  NaCl2 
E)  None of these

Question 10

Which of these does not form a positive ion in an ionic compound?

Accepted Answer

A)  Ba 
B)  Rb 
C)  P 
D)  Sn 
E)  Mg 
A)  Ba 
B)  Rb 
C)  P 
D)  Sn 
E)  Mg

Question 11

Consider  the reaction: 4 NH3 + 5 O2 → 6 H2O + 4 NO
If 125.0 g of NH3 reacts with 225.0 g of O2, how many grams of O2 will be present after a complete reaction?

Accepted Answer

A)  0 grams 
B)  125.0 grams 
C)  225.0 grams 
D)  350.0 grams 
E)  425.0 grams 
A)  0 grams 
B)  125.0 grams 
C)  225.0 grams 
D)  350.0 grams 
E)  425.0 grams

Question 12

Which of these is the correct name for N2O3?

Accepted Answer

A)  Nitrogen trioxide 
B)  Trinitrogen dioxide 
C)  Dinitrogen trioxide 
D)  Nitrogen dioxygenide 
E)  Dinitrogenide dioxygenide 
A)  Nitrogen trioxide 
B)  Trinitrogen dioxide 
C)  Dinitrogen trioxide 
D)  Nitrogen dioxygenide 
E)  Dinitrogenide dioxygenide

Question 13

How many moles of oxygen gas are required to react with 9 moles of acetylene (C  2  H  2  ) in the given equation?
​
2 C2H2 + 5 O2(g) → 4 CO2 + 2 H2O

Accepted Answer

A)  0.4 moles 
B)  4.5 moles 
C)  9 moles 
D)  18 moles 
E)  22.5 moles 
A)  0.4 moles 
B)  4.5 moles 
C)  9 moles 
D)  18 moles 
E)  22.5 moles

Question 14

Which of these does not form a negative ion in an ionic compound?

Accepted Answer

A)  Br 
B)  N 
C)  Se 
D)  I 
E)  Al 
A)  Br 
B)  N 
C)  Se 
D)  I 
E)  Al

Question 15

How many moles of caffeine (C8H10N4O2) are present in a 1.250 kg sample ?

Accepted Answer

A)  6.4 × 10 − 6 moles 
B)  0.006 moles 
C)  0.008 moles 
D)  6.44 moles 
E)  8.56 moles 
A)  6.4 × 10 − 6 moles 
B)  0.006 moles 
C)  0.008 moles 
D)  6.44 moles 
E)  8.56 moles

Question 16

When properly balanced, what will the coefficients in the following equation be?
 
_____ Mg + _____ N  2  → _____ Mg  3  N  2

Accepted Answer

A)  1; 1; 1 
B)  3; 2; 1 
C)  3; 1; 1 
D)  3; 1; 2 
E)  1; 1; 3 
A)  1; 1; 1 
B)  3; 2; 1 
C)  3; 1; 1 
D)  3; 1; 2 
E)  1; 1; 3

Question 17

The formula mass of a compound is _____.

Accepted Answer

A)  the atomic mass of the more metallic element in the compound 
B)  the atomic number of the more metallic element in the compound 
C)  the sum of atomic numbers of all atoms in the compound 
D)  the sum of atomic masses of all atoms in the compound 
E)  the ratio of atomic mass to the atomic number of the compound 
A)  the atomic mass of the more metallic element in the compound 
B)  the atomic number of the more metallic element in the compound 
C)  the sum of atomic numbers of all atoms in the compound 
D)  the sum of atomic masses of all atoms in the compound 
E)  the ratio of atomic mass to the atomic number of the compound

Question 18

Barium fluoride is often used in glass manufacturing. Which of these is the correct formula and bonding type for barium fluoride?

Accepted Answer

A)  BaF, ionic 
B)  BaF, covalent 
C)  BaF2, ionic 
D)  BaF2, covalent 
E)  Ba2F, ionic 
A)  BaF, ionic 
B)  BaF, covalent 
C)  BaF2, ionic 
D)  BaF2, covalent 
E)  Ba2F, ionic

Question 19

Which of the following has the greatest mass of oxygen?

Accepted Answer

A)  16.0 g of O2 
B)  0.500 mol of O2 
C)  2 moles of O atoms 
D)  10 grams of CO2 
E)  15 grams of NO2 
A)  16.0 g of O2 
B)  0.500 mol of O2 
C)  2 moles of O atoms 
D)  10 grams of CO2 
E)  15 grams of NO2

Question 20

Which of these is the correct ratio of sulfur to oxygen in SO2?

Accepted Answer

A)  1 sulfur : 2 oxygen 
B)  2 sulfur : 1 oxygen 
C)  2 sulfur : 2 oxygen 
D)  2 sulfur : 3 oxygen 
E)  1 sulfur : 3 oxygen 
A)  1 sulfur : 2 oxygen 
B)  2 sulfur : 1 oxygen 
C)  2 sulfur : 2 oxygen 
D)  2 sulfur : 3 oxygen 
E)  1 sulfur : 3 oxygen

How many moles of hydrogen atoms are there in 3 moles of codeine (C₁₈H₂₁NO₃)?

Which of these is the correct name for NaHCO₃?

How many grams of carbon dioxide are produced when 18.5 moles of oxygen react with excess acetylene according to the given equation? 2 C₂H₂ + 5 O₂(g) → 4 CO₂ + 2 H₂O

A tiny amount of magnesium chloride contains 150 magnesium ions and 300 chloride ions. The correct formula for magnesium chloride is _____.

Calculate the number of oxygen atoms in 45.0 g of Co₂(SO₄)₃ (molar mass of Co ₂ (SO ₄ ) ₃= 405.8 g/mole).

Consider the reaction: 4 NH₃ + 5 O₂ → 6 H₂O + 4 NO If 125.0 g of NH₃ reacts with 225.0 g of O₂, how many grams of NH₃ will be present after a complete reaction?

In the following equation, what is the coefficient of sodium nitride when the equation is balanced? ___ Na ₃ N → _ Na(s) + ___ N ₂ (g)

How many grams of nitrogen dioxide are required to produce 260 grams of nitrogen monoxide? 3 NO₂ + H₂O → 2 HNO₃ + NO

A tiny crystal of sodium chloride contains 5,000,000 sodium ions and 5,000,000 chloride ions. The correct formula for sodium chloride is _____.

Which of these does not form a positive ion in an ionic compound?

Consider the reaction: 4 NH₃ + 5 O₂ → 6 H₂O + 4 NO If 125.0 g of NH₃ reacts with 225.0 g of O₂, how many grams of O₂ will be present after a complete reaction?

Which of these is the correct name for N₂O₃?

How many moles of oxygen gas are required to react with 9 moles of acetylene (C ₂ H ₂ ) in the given equation? 2 C₂H₂ + 5 O₂(g) → 4 CO₂ + 2 H₂O

Which of these does not form a negative ion in an ionic compound?

How many moles of caffeine (C₈H₁₀N₄O₂) are present in a 1.250 kg sample ?

When properly balanced, what will the coefficients in the following equation be? ___ Mg + _ N ₂ → ___ Mg ₃ N ₂

The formula mass of a compound is _____.

Barium fluoride is often used in glass manufacturing. Which of these is the correct formula and bonding type for barium fluoride?

Which of the following has the greatest mass of oxygen?

Which of these is the correct ratio of sulfur to oxygen in SO₂?

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Exam 4: Molecules, Compounds, and Chemical Reactions

How many moles of hydrogen atoms are there in 3 moles of codeine (C18H21NO3)?

Which of these is the correct name for NaHCO3?

How many grams of carbon dioxide are produced when 18.5 moles of oxygen react with excess acetylene according to the given equation? ​ 2 C2H2 + 5 O2(g) → 4 CO2 + 2 H2O

A tiny amount of magnesium chloride contains 150 magnesium ions and 300 chloride ions. The correct formula for magnesium chloride is _____.

Calculate the number of oxygen atoms in 45.0 g of Co2(SO4)3 (molar mass of Co 2 (SO 4 ) 3 = 405.8 g/mole).

Consider the reaction: 4 NH3 + 5 O2 → 6 H2O + 4 NO If 125.0 g of NH3 reacts with 225.0 g of O2, how many grams of NH3 will be present after a complete reaction?

In the following equation, what is the coefficient of sodium nitride when the equation is balanced? _____ Na 3 N → _____ Na(s) + _____ N 2 (g)

How many grams of nitrogen dioxide are required to produce 260 grams of nitrogen monoxide? 3 NO2 + H2O → 2 HNO3 + NO

A tiny crystal of sodium chloride contains 5,000,000 sodium ions and 5,000,000 chloride ions. The correct formula for sodium chloride is _____.

Which of these does not form a positive ion in an ionic compound?

Consider the reaction: 4 NH3 + 5 O2 → 6 H2O + 4 NO If 125.0 g of NH3 reacts with 225.0 g of O2, how many grams of O2 will be present after a complete reaction?

Which of these is the correct name for N2O3?

How many moles of oxygen gas are required to react with 9 moles of acetylene (C 2 H 2 ) in the given equation? ​ 2 C2H2 + 5 O2(g) → 4 CO2 + 2 H2O

Which of these does not form a negative ion in an ionic compound?

How many moles of caffeine (C8H10N4O2) are present in a 1.250 kg sample ?

When properly balanced, what will the coefficients in the following equation be? _____ Mg + _____ N 2 → _____ Mg 3 N 2

The formula mass of a compound is _____.

Barium fluoride is often used in glass manufacturing. Which of these is the correct formula and bonding type for barium fluoride?

Which of the following has the greatest mass of oxygen?

Which of these is the correct ratio of sulfur to oxygen in SO2?

Molecular Reasons

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Acids and Bases: the Molecules Responsible for Sour and Bitter

Oxidation and Reduction

The Chemistry of Household Products

Biochemistry and Biotechnology

Drugs and Medicine: Healing, Helping, and Hurting

The Chemistry of Food

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Filters

How many moles of hydrogen atoms are there in 3 moles of codeine (C₁₈H₂₁NO₃)?

Which of these is the correct name for NaHCO₃?

How many grams of carbon dioxide are produced when 18.5 moles of oxygen react with excess acetylene according to the given equation? 2 C₂H₂ + 5 O₂(g) → 4 CO₂ + 2 H₂O

Calculate the number of oxygen atoms in 45.0 g of Co₂(SO₄)₃ (molar mass of Co ₂ (SO ₄ ) ₃= 405.8 g/mole).

Consider the reaction: 4 NH₃ + 5 O₂ → 6 H₂O + 4 NO If 125.0 g of NH₃ reacts with 225.0 g of O₂, how many grams of NH₃ will be present after a complete reaction?

In the following equation, what is the coefficient of sodium nitride when the equation is balanced? ___ Na ₃ N → _ Na(s) + ___ N ₂ (g)

How many grams of nitrogen dioxide are required to produce 260 grams of nitrogen monoxide? 3 NO₂ + H₂O → 2 HNO₃ + NO

Consider the reaction: 4 NH₃ + 5 O₂ → 6 H₂O + 4 NO If 125.0 g of NH₃ reacts with 225.0 g of O₂, how many grams of O₂ will be present after a complete reaction?

Which of these is the correct name for N₂O₃?

How many moles of oxygen gas are required to react with 9 moles of acetylene (C ₂ H ₂ ) in the given equation? 2 C₂H₂ + 5 O₂(g) → 4 CO₂ + 2 H₂O

How many moles of caffeine (C₈H₁₀N₄O₂) are present in a 1.250 kg sample ?

When properly balanced, what will the coefficients in the following equation be? ___ Mg + _ N ₂ → ___ Mg ₃ N ₂

Which of these is the correct ratio of sulfur to oxygen in SO₂?