Question 1

Which of the following is not true of 3  moles of CaCO3?

Accepted Answer

A)  It contains 3 moles of O. 
B)  It contains 3 moles of Ca. 
C)  It contains 3 moles of C. 
D)  It contains 9 moles of O. 
E)  It contains equal moles of C and Ca. 
A)  It contains 3 moles of O. 
B)  It contains 3 moles of Ca. 
C)  It contains 3 moles of C. 
D)  It contains 9 moles of O. 
E)  It contains equal moles of C and Ca.

Question 2

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

Accepted Answer

A)  0 grams 
B)  168.8 grams 
C)  220.6 grams 
D)  350.0 grams 
E)  64.6 grams 
A)  0 grams 
B)  168.8 grams 
C)  220.6 grams 
D)  350.0 grams 
E)  64.6 grams

Question 3

Methane decomposes into  two simpler substances, hydrogen and carbon. Therefore, methane is a(n) _____.

Accepted Answer

A)  molecule 
B)  element 
C)  atom 
D)  compound 
E)  ion 
A)  molecule 
B)  element 
C)  atom 
D)  compound 
E)  ion

Question 4

How many moles of carbon atoms are present in 1.574 g  of procaine hydrochloride , CS1U1B113S1U1B0 HS1U1B121S1U1B0 NS1U1B12 S1U1B0OS1U1B12S1U1B0 Cl?

Accepted Answer

A)  0.01008 moles 
B)  0.005776 moles 
C)  0.07501 moles 
D)  0.12096 moles 
E)  0.006148 moles 
A)  0.01008 moles 
B)  0.005776 moles 
C)  0.07501 moles 
D)  0.12096 moles 
E)  0.006148 moles

Question 5

In the following equation, which of these is the correct sum   of all the coefficients   when the equation is balanced?
_____ CaCl  2  (aq) + _____ K  2  CO  3  (aq) → _____ KCl(aq) + _____ CaCO  3  (s)

Accepted Answer

A)  2 
B)  4 
C)  5 
D)  8 
E)  10 
A)  2 
B)  4 
C)  5 
D)  8 
E)  10

Question 6

How many chromium atoms are there in 78.8 g of K2Cr2O7?

Accepted Answer

A)  2.24 × 1024 atoms 
B)  1.12 × 1024 atoms 
C)  3.23 × 1023 atoms 
D)  1.61 × 1023 atoms 
E)  2.25 × 1022 atoms 
A)  2.24 × 1024 atoms 
B)  1.12 × 1024 atoms 
C)  3.23 × 1023 atoms 
D)  1.61 × 1023 atoms 
E)  2.25 × 1022 atoms

Question 7

Determine the number of moles in a 1.95 × 10 − 2 gram sample of the amino acid glycine, CH2(NH2)CO2H.

Accepted Answer

A)  2.6 × 10 − 4 moles 
B)  2.6 × 10 − 2 moles 
C)  1.46 moles 
D)  2.0 × 10 − 2 moles 
E)  3.85 × 10 − 1 moles 
A)  2.6 × 10 − 4 moles 
B)  2.6 × 10 − 2 moles 
C)  1.46 moles 
D)  2.0 × 10 − 2 moles 
E)  3.85 × 10 − 1 moles

Question 8

Which of these is an ionic compound?

Accepted Answer

A)  NCl3 
B)  Li2O 
C)  PF5 
D)  CH4 
E)  I2 
A)  NCl3 
B)  Li2O 
C)  PF5 
D)  CH4 
E)  I2

Question 9

Which of these substances is not a mixture of different compounds?

Accepted Answer

A)  Air 
B)  Salt water 
C)  Gasoline 
D)  Table salt 
E)  Lemonade 
A)  Air 
B)  Salt water 
C)  Gasoline 
D)  Table salt 
E)  Lemonade

Question 10

Calculate the mass in grams of 1.070 moles of acetylene, C2H2.

Accepted Answer

A)  0.02434 grams 
B)  0.04415 grams 
C)  14.98 grams 
D)  25.68 grams 
E)  27.82 grams 
A)  0.02434 grams 
B)  0.04415 grams 
C)  14.98 grams 
D)  25.68 grams 
E)  27.82 grams

Question 11

Which of these is the correct name for Rb3N?

Accepted Answer

A)  Rubidium nitride 
B)  Radon nitride 
C)  Trirubidium trinitride 
D)  Triradon nitride 
E)  Rubidium trinitride 
A)  Rubidium nitride 
B)  Radon nitride 
C)  Trirubidium trinitride 
D)  Triradon nitride 
E)  Rubidium trinitride

Question 12

Consider the reaction: 4 NH  3  + 5 O  2  → 6 H  2  O + 4 NO
If 125.0 g of NH3 reacts with 225.0 g of O2, what is the limiting reagent?

Accepted Answer

A)  NH3 
B)  O2 
C)  H2O 
D)  NO 
E)  None of these 
A)  NH3 
B)  O2 
C)  H2O 
D)  NO 
E)  None of these

Question 13

Which of these is the correct name for Ca(OH)2?

Accepted Answer

A)  Calcium carbonate 
B)  Calcium oxide 
C)  Calcium dihydride 
D)  Calcium oxygen hydride 
E)  Calcium hydroxide 
A)  Calcium carbonate 
B)  Calcium oxide 
C)  Calcium dihydride 
D)  Calcium oxygen hydride 
E)  Calcium hydroxide

Question 14

How many hydrogen atoms are there in 25.6 g of sucrose (C12H22O11)?

Accepted Answer

A)  1.647 atoms 
B)  2.6 × 1023 atoms 
C)  4.51 × 1022 atoms 
D)  6.02 × 1023 atoms 
E)  9.92 × 1023 atoms 
A)  1.647 atoms 
B)  2.6 × 1023 atoms 
C)  4.51 × 1022 atoms 
D)  6.02 × 1023 atoms 
E)  9.92 × 1023 atoms

Question 15

How many moles of nitrogen atoms are present in 12 moles of NH4NO3?

Accepted Answer

A)  6 moles 
B)  12 moles 
C)  14 moles 
D)  24 moles 
E)  28 moles 
A)  6 moles 
B)  12 moles 
C)  14 moles 
D)  24 moles 
E)  28 moles

Question 16

Which of the following does not contain the same number of chlorine atoms as in 60 CCl4 molecules?

Accepted Answer

A)  240 HCl molecules 
B)  120 Cl2 molecules 
C)  40 SCl6 molecules 
D)  80 CFCl3 molecules 
E)  60 CHCl3 molecules 
A)  240 HCl molecules 
B)  120 Cl2 molecules 
C)  40 SCl6 molecules 
D)  80 CFCl3 molecules 
E)  60 CHCl3 molecules

Question 17

Which of these is an ionic compound?

Accepted Answer

A)  AlCl3 
B)  H2O 
C)  SiO2 
D)  IBr 
E)  S8 
A)  AlCl3 
B)  H2O 
C)  SiO2 
D)  IBr 
E)  S8

Question 18

How many moles of oxygen gas will react with 6.2 moles of aluminum in the given equation?
​
4 Al(s) + 3 O2(g) → 2 Al2O3(s)

Accepted Answer

A)  0.12 moles 
B)  1.55 moles 
C)  2.4 moles 
D)  4.65 moles 
E)  8.27 moles 
A)  0.12 moles 
B)  1.55 moles 
C)  2.4 moles 
D)  4.65 moles 
E)  8.27 moles

Question 19

What is the formula mass of  boric acid, B(OH)3?

Accepted Answer

A)  51 amu 
B)  61.83 amu 
C)  101.3 amu 
D)  153 amu 
E)  306 amu 
A)  51 amu 
B)  61.83 amu 
C)  101.3 amu 
D)  153 amu 
E)  306 amu

Question 20

How many grams of methanol (CH3OH) are produced when 5.00 kg of H2 reacts with excess carbon monoxide?
​
CO + 2 H2 → CH3OH

Accepted Answer

A)  40 g 
B)  80 g 
C)  320 g 
D)  640 g 
E)  40,000 g 
A)  40 g 
B)  80 g 
C)  320 g 
D)  640 g 
E)  40,000 g

Which of the following is not true of 3 moles of CaCO₃?

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

Methane decomposes into two simpler substances, hydrogen and carbon. Therefore, methane is a(n) _____.

How many moles of carbon atoms are present in 1.574 g of procaine hydrochloride , C₁₃ H₂₁ N₂O₂ Cl?

In the following equation, which of these is the correct sum of all the coefficients when the equation is balanced? ___ CaCl ₂ (aq) + _ K ₂ CO ₃ (aq) → _ KCl(aq) + ___ CaCO ₃ (s)

How many chromium atoms are there in 78.8 g of K₂Cr₂O₇?

Determine the number of moles in a 1.95 × 10^{− 2} gram sample of the amino acid glycine, CH₂(NH₂)CO₂H.

Which of these is an ionic compound?

Which of these substances is not a mixture of different compounds?

Calculate the mass in grams of 1.070 moles of acetylene, C₂H₂.

Which of these is the correct name for Rb₃N?

Consider the reaction: 4 NH ₃ + 5 O ₂ → 6 H ₂ O + 4 NO If 125.0 g of NH₃ reacts with 225.0 g of O₂, what is the limiting reagent?

Which of these is the correct name for Ca(OH)₂?

How many hydrogen atoms are there in 25.6 g of sucrose (C₁₂H₂₂O₁₁)?

How many moles of nitrogen atoms are present in 12 moles of NH₄NO₃?

Which of the following does not contain the same number of chlorine atoms as in 60 CCl₄ molecules?

Which of these is an ionic compound?

How many moles of oxygen gas will react with 6.2 moles of aluminum in the given equation? 4 Al(s) + 3 O₂(g) → 2 Al₂O₃(s)

What is the formula mass of boric acid, B(OH)₃?

How many grams of methanol (CH₃OH) are produced when 5.00 kg of H₂ reacts with excess carbon monoxide? CO + 2 H₂ → CH₃OH

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Exam 4: Molecules, Compounds, and Chemical Reactions

Which of the following is not true of 3 moles of CaCO3?

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

Methane decomposes into two simpler substances, hydrogen and carbon. Therefore, methane is a(n) _____.

How many moles of carbon atoms are present in 1.574 g of procaine hydrochloride , C13 H21 N2 O2 Cl?

In the following equation, which of these is the correct sum of all the coefficients when the equation is balanced? _____ CaCl 2 (aq) + _____ K 2 CO 3 (aq) → _____ KCl(aq) + _____ CaCO 3 (s)

How many chromium atoms are there in 78.8 g of K2Cr2O7?

Determine the number of moles in a 1.95 × 10 − 2 gram sample of the amino acid glycine, CH2(NH2)CO2H.

Which of these is an ionic compound?

Which of these substances is not a mixture of different compounds?

Calculate the mass in grams of 1.070 moles of acetylene, C2H2.

Which of these is the correct name for Rb3N?

Consider the reaction: 4 NH 3 + 5 O 2 → 6 H 2 O + 4 NO If 125.0 g of NH3 reacts with 225.0 g of O2, what is the limiting reagent?

Which of these is the correct name for Ca(OH)2?

How many hydrogen atoms are there in 25.6 g of sucrose (C12H22O11)?

How many moles of nitrogen atoms are present in 12 moles of NH4NO3?

Which of the following does not contain the same number of chlorine atoms as in 60 CCl4 molecules?

Which of these is an ionic compound?

How many moles of oxygen gas will react with 6.2 moles of aluminum in the given equation? ​ 4 Al(s) + 3 O2(g) → 2 Al2O3(s)

What is the formula mass of boric acid, B(OH)3?

How many grams of methanol (CH3OH) are produced when 5.00 kg of H2 reacts with excess carbon monoxide? ​ CO + 2 H2 → CH3OH

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Chemical Bonding

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The Liquids and Solids Around Us: Especially Water

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

Nanotechnology Online Only

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Which of the following is not true of 3 moles of CaCO₃?

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

How many moles of carbon atoms are present in 1.574 g of procaine hydrochloride , C₁₃ H₂₁ N₂O₂ Cl?

In the following equation, which of these is the correct sum of all the coefficients when the equation is balanced? ___ CaCl ₂ (aq) + _ K ₂ CO ₃ (aq) → _ KCl(aq) + ___ CaCO ₃ (s)

How many chromium atoms are there in 78.8 g of K₂Cr₂O₇?

Determine the number of moles in a 1.95 × 10^{− 2} gram sample of the amino acid glycine, CH₂(NH₂)CO₂H.

Calculate the mass in grams of 1.070 moles of acetylene, C₂H₂.

Which of these is the correct name for Rb₃N?

Consider the reaction: 4 NH ₃ + 5 O ₂ → 6 H ₂ O + 4 NO If 125.0 g of NH₃ reacts with 225.0 g of O₂, what is the limiting reagent?

Which of these is the correct name for Ca(OH)₂?

How many hydrogen atoms are there in 25.6 g of sucrose (C₁₂H₂₂O₁₁)?

How many moles of nitrogen atoms are present in 12 moles of NH₄NO₃?

Which of the following does not contain the same number of chlorine atoms as in 60 CCl₄ molecules?

How many moles of oxygen gas will react with 6.2 moles of aluminum in the given equation? 4 Al(s) + 3 O₂(g) → 2 Al₂O₃(s)

What is the formula mass of boric acid, B(OH)₃?

How many grams of methanol (CH₃OH) are produced when 5.00 kg of H₂ reacts with excess carbon monoxide? CO + 2 H₂ → CH₃OH