Question 1

What is the molar volume of a gas at 6°C and 975 torr?

Accepted Answer

A) 17.9 L/mol 
B) 0.384 L/mol 
C) 0.0560 L/mol 
D) 0.0235 L/mol 
E) 5.05 × 10-4 L/mol 
A) 17.9 L/mol 
B) 0.384 L/mol 
C) 0.0560 L/mol 
D) 0.0235 L/mol 
E) 5.05 × 10-4 L/mol

Question 2

If the molar volume of a gas is 23.6 L/mol,how many moles are in 2.14 L?

Accepted Answer

A) 50.5 mol 
B) 22.4 mol 
C) 11.0 mol 
D) 0.0907 mol 
E) 0.0198 mol 
A) 50.5 mol 
B) 22.4 mol 
C) 11.0 mol 
D) 0.0907 mol 
E) 0.0198 mol

Question 3

Consider the reaction 2 NH3(g)+ CO2(g)→ H2NCONH2(s)+ H2O(g).If 93.5 kL of ammonia at STP is reacted with excess carbon dioxide,how many kilograms of urea will be formed?

Accepted Answer

A) 124 kg 
B) 501 kg 
C) 1.05 × 103 kg 
D) 6.29 × 104 kg 
E) 2.52 × 105 kg 
A) 124 kg 
B) 501 kg 
C) 1.05 × 103 kg 
D) 6.29 × 104 kg 
E) 2.52 × 105 kg

Question 4

Which of the following gases should have the largest density at STP?

Accepted Answer

A) HCN 
B) Cl2 
C) CH3CH2CH3 
D) C4H10 
E) The density cannot be predicted with the given data. 
A) HCN 
B) Cl2 
C) CH3CH2CH3 
D) C4H10 
E) The density cannot be predicted with the given data.

Question 5

How does the volume of 3 × 1022 hydrogen molecules compare with the volume of 3 × 1022 helium atoms,when both are measured at the same temperature and pressure?

Accepted Answer

A) The volume of hydrogen is twice the volume of helium 
B) The volume of helium is twice the volume of hydrogen 
C) The volume of hydrogen is four times the volume of helium 
D) The volume of helium is four times the volume of hydrogen 
E) Both volumes are the same 
A) The volume of hydrogen is twice the volume of helium 
B) The volume of helium is twice the volume of hydrogen 
C) The volume of hydrogen is four times the volume of helium 
D) The volume of helium is four times the volume of hydrogen 
E) Both volumes are the same

Question 6

What is the common reference conditions for temperature and pressure (STP),respectively?

Accepted Answer

A) 273 K, 1 bar 
B) 100 °C, 1 Pa 
C) 0 K, 1 bar 
D) 273 K, 1 atm 
E) 0 K, 1 bar. 
A) 273 K, 1 bar 
B) 100 °C, 1 Pa 
C) 0 K, 1 bar 
D) 273 K, 1 atm 
E) 0 K, 1 bar.

Question 7

Calculate the density of nitrogen dioxide at STP.

Accepted Answer

A) 2.70 × 10-3 g/L 
B) 0.487 g/L 
C) 22.7 g/L 
D) 2.03 g/L 
E) 1.88 g/L 
A) 2.70 × 10-3 g/L 
B) 0.487 g/L 
C) 22.7 g/L 
D) 2.03 g/L 
E) 1.88 g/L

Question 8

Which of the following is a mathematical expression of the Ideal Gas Law,using the symbols commonly assigned to the measurable properties of gases in the chemistry literature (k represents a constant)?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 9

What volume is occupied by 0.0100 mole of carbon monoxide at 9°C and 0.973 atm?

Accepted Answer

A) 0.00759 L 
B) 0.132 L 
C) 0.238 L 
D) 4.20 L 
E) 577 L 
A) 0.00759 L 
B) 0.132 L 
C) 0.238 L 
D) 4.20 L 
E) 577 L

Question 10

Which of the following statements is incorrect?
i.The molar volume of a gas is the number of moles in one liter
ii.The molar volume of a gas is variable depending on temperature and pressure
iii.All gases have the same molar volume at the same temperature and pressure

Accepted Answer

A) All are correct 
B) i only 
C) ii only 
D) iii only 
E) ii and iii 
A) All are correct 
B) i only 
C) ii only 
D) iii only 
E) ii and iii

Question 11

Calculate the number of moles in 3.13 L of dinitrogen monoxide at STP.

Accepted Answer

A) 0.140 mol 
B) 7.16 mol 
C) 93.9 mol 
D) 70.1 mol 
E) 138 mol 
A) 0.140 mol 
B) 7.16 mol 
C) 93.9 mol 
D) 70.1 mol 
E) 138 mol

Question 12

Consider the reaction CO(g)+ 2 H2(g)→ CH3OH(g).If 15.0 L of hydrogen,measured at 22°C and 732 torr,reacts with excess carbon monoxide,what volume of methanol,measured at 345°C at 1.12 × 103 torr,will be produced?

Accepted Answer

A) 2.34 L 
B) 5.48 L 
C) 10.3 L 
D) 24.0 L 
E) 41.1 L 
A) 2.34 L 
B) 5.48 L 
C) 10.3 L 
D) 24.0 L 
E) 41.1 L

Question 13

Liquid butane burns according to the equation 2 C4H10(   )+ 13 O2(g)→ 8 CO2(g)+ 10 H2O(g).How many grams of butane have burned if 3.39 L of carbon dioxide is produced at 34°C and 1.22 atm?

Accepted Answer

A) 2.38 g 
B) 3.02 g 
C) 1.60 g 
D) 38.2 g 
E) 1.20 × 103 g 
A) 2.38 g 
B) 3.02 g 
C) 1.60 g 
D) 38.2 g 
E) 1.20 × 103 g

Question 14

What is the volume of 0.0775 mole of nitrogen if the molar volume is 27.6 L/mol?

Accepted Answer

A) 59.9 L 
B) 2.14 L 
C) 0.468 L 
D) 0.0786 L 
E) 2.81 × 10-3 L 
A) 59.9 L 
B) 2.14 L 
C) 0.468 L 
D) 0.0786 L 
E) 2.81 × 10-3 L

Question 15

What is the density of helium gas at 17°C and 773 torr?

Accepted Answer

A) 0.171 g/L 
B) 2.91 g/L 
C) 5.85 g/L 
D) 1.30 × 102 g/L 
E) 2.22 × 103 g/L 
A) 0.171 g/L 
B) 2.91 g/L 
C) 5.85 g/L 
D) 1.30 × 102 g/L 
E) 2.22 × 103 g/L

Question 16

If 26.0 liters of methane,CH4,measured at 1.09 atm and 23.0? 0°C,are converted to acetylene,C2H2,what volume of acetylene,measured at 0.941 atm and 185?
0°C,will result?
2 CH4 → C2H2 + 3 H2

Accepted Answer

A) 9.73 L 
B) 17.4 L 
C) 23.3 L 
D) 93.2 L 
E) 0.0429 L 
A) 9.73 L 
B) 17.4 L 
C) 23.3 L 
D) 93.2 L 
E) 0.0429 L

Question 17

Determine the STP volume of sulfur hexafluoride that will be produced from the reaction of 25.0 kg of sulfur in the reaction S(   )+ 3 F2(g)→ SF6(g).

Accepted Answer

A) 0.0348 kL 
B) 34.8 kL 
C) 0.0175 kL 
D) 17.7 kL 
E) 1.75 × 104 kL 
A) 0.0348 kL 
B) 34.8 kL 
C) 0.0175 kL 
D) 17.7 kL 
E) 1.75 × 104 kL

Question 18

What is the molar mass of a gas if 1.070 g of the gas occupies 264 mL at 100°C and 768 torr?

Accepted Answer

A) 0.123 g/mol 
B) 0.162 g/mol 
C) 32.9 g/mol 
D) 64.0 g/mol 
E) 123 g/mol 
A) 0.123 g/mol 
B) 0.162 g/mol 
C) 32.9 g/mol 
D) 64.0 g/mol 
E) 123 g/mol

Question 19

1.00 g of Fe3O4 is formed in the reaction 4 H2O(g)+ 3 Fe(s)→ Fe3O4(s)+ 4 H2(g).How many liters of hydrogen are also formed,if measured at STP?

Accepted Answer

A) 0.0242 L 
B) 0.0967 L 
C) 0.392 L 
D) 2.58 L 
E) 89.6 L 
A) 0.0242 L 
B) 0.0967 L 
C) 0.392 L 
D) 2.58 L 
E) 89.6 L

Question 20

An unknown substance is vaporized at 200°C and 94.2 torr,under which conditions its density is 0.198 grams per liter.Find the molar mass.

Accepted Answer

A) 0.0161 g/mol 
B) 0.0345 g/mol 
C) 0.0816 g/mol 
D) 26.2 g/mol 
E) 62.0 g/mol 
A) 0.0161 g/mol 
B) 0.0345 g/mol 
C) 0.0816 g/mol 
D) 26.2 g/mol 
E) 62.0 g/mol

Exam 14: The Ideal Gas Law and Its Applications

What is the molar volume of a gas at 6°C and 975 torr?

If the molar volume of a gas is 23.6 L/mol,how many moles are in 2.14 L?

Consider the reaction 2 NH3(g)+ CO2(g)→ H2NCONH2(s)+ H2O(g).If 93.5 kL of ammonia at STP is reacted with excess carbon dioxide,how many kilograms of urea will be formed?

Which of the following gases should have the largest density at STP?

How does the volume of 3 × 1022 hydrogen molecules compare with the volume of 3 × 1022 helium atoms,when both are measured at the same temperature and pressure?

What is the common reference conditions for temperature and pressure (STP),respectively?

Calculate the density of nitrogen dioxide at STP.

Which of the following is a mathematical expression of the Ideal Gas Law,using the symbols commonly assigned to the measurable properties of gases in the chemistry literature (k represents a constant)?

What volume is occupied by 0.0100 mole of carbon monoxide at 9°C and 0.973 atm?

Which of the following statements is incorrect? i.The molar volume of a gas is the number of moles in one liter ii.The molar volume of a gas is variable depending on temperature and pressure iii.All gases have the same molar volume at the same temperature and pressure

Calculate the number of moles in 3.13 L of dinitrogen monoxide at STP.

Consider the reaction CO(g)+ 2 H2(g)→ CH3OH(g).If 15.0 L of hydrogen,measured at 22°C and 732 torr,reacts with excess carbon monoxide,what volume of methanol,measured at 345°C at 1.12 × 103 torr,will be produced?

Liquid butane burns according to the equation 2 C4H10( )+ 13 O2(g)→ 8 CO2(g)+ 10 H2O(g).How many grams of butane have burned if 3.39 L of carbon dioxide is produced at 34°C and 1.22 atm?

What is the volume of 0.0775 mole of nitrogen if the molar volume is 27.6 L/mol?

What is the density of helium gas at 17°C and 773 torr?

If 26.0 liters of methane,CH4,measured at 1.09 atm and 23.0? 0°C,are converted to acetylene,C2H2,what volume of acetylene,measured at 0.941 atm and 185? 0°C,will result? 2 CH4 → C2H2 + 3 H2

Determine the STP volume of sulfur hexafluoride that will be produced from the reaction of 25.0 kg of sulfur in the reaction S( )+ 3 F2(g)→ SF6(g).

What is the molar mass of a gas if 1.070 g of the gas occupies 264 mL at 100°C and 768 torr?

1.00 g of Fe3O4 is formed in the reaction 4 H2O(g)+ 3 Fe(s)→ Fe3O4(s)+ 4 H2(g).How many liters of hydrogen are also formed,if measured at STP?

An unknown substance is vaporized at 200°C and 94.2 torr,under which conditions its density is 0.198 grams per liter.Find the molar mass.

Matter and Energy

Measurement and Chemical Calculations

Introduction to Gases

Atomic Theory: The Nuclear Model of the Atom

Chemical Nomenclature

Chemical Formula Relationships

Chemical Reactions

Chemical Change

Quantity Relationships in Chemical Reactions

Atomic Theory: The Quantum Model of the Atom

Chemical Bonding

Structure and Shape

Gases, Liquids, and Solids

Solutions

Acidbase Proton Transferreactions

Chemical Equilibrium

Oxidationreduction Electron Transferreactions

Nuclear Chemistry

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Consider the reaction 2 NH₃(g)+ CO₂(g)→ H₂NCONH₂(s)+ H₂O(g).If 93.5 kL of ammonia at STP is reacted with excess carbon dioxide,how many kilograms of urea will be formed?

How does the volume of 3 × 10²² hydrogen molecules compare with the volume of 3 × 10²² helium atoms,when both are measured at the same temperature and pressure?

Consider the reaction CO(g)+ 2 H₂(g)→ CH₃OH(g).If 15.0 L of hydrogen,measured at 22°C and 732 torr,reacts with excess carbon monoxide,what volume of methanol,measured at 345°C at 1.12 × 10³ torr,will be produced?

Liquid butane burns according to the equation 2 C₄H₁₀( )+ 13 O₂(g)→ 8 CO₂(g)+ 10 H₂O(g).How many grams of butane have burned if 3.39 L of carbon dioxide is produced at 34°C and 1.22 atm?

If 26.0 liters of methane,CH₄,measured at 1.09 atm and 23.0? 0°C,are converted to acetylene,C₂H₂,what volume of acetylene,measured at 0.941 atm and 185? 0°C,will result? 2 CH₄ → C₂H₂ + 3 H₂

Determine the STP volume of sulfur hexafluoride that will be produced from the reaction of 25.0 kg of sulfur in the reaction S( )+ 3 F₂(g)→ SF₆(g).

1.00 g of Fe₃O₄ is formed in the reaction 4 H₂O(g)+ 3 Fe(s)→ Fe₃O₄(s)+ 4 H₂(g).How many liters of hydrogen are also formed,if measured at STP?