Question 1

What is the pressure of the sample of gas trapped in the open-tube mercury manometer shown below if atmospheric pressure is 736 mmHg and h = 9.2 cm

Accepted Answer

A)  92 mmHg 
B)  644 mmHg 
C)  736 mmHg 
D)  828 mmHg 
A)  92 mmHg 
B)  644 mmHg 
C)  736 mmHg 
D)  828 mmHg

Question 2

Charles Law states that the volume of a fixed amount of gas maintained at constant pressure is inversely proportional to the absolute temperature of the gas.

Accepted Answer

A) True 
 B)False

Question 3

A 1.17 g sample of an alkane hydrocarbon gas occupies a volume of 674 mL at 28$\circ$C and 741 mmHg. Alkanes are known to have the general formula CnH2n+2. What is the molecular formula of the gas in this sample (R = 0.08206 L * atm/K * mol)

Accepted Answer

A)  CH4 
B)  C2H6 
C)  C3H8 
D)  C4H10 
E)  C5H12 
A)  CH4 
B)  C2H6 
C)  C3H8 
D)  C4H10 
E)  C5H12

Question 4

A pressure that will support a column of Hg to a height of 256 mm would support a column of water to what height The density of mercury is 13.6 g/cm3; the density of water is 1.00 g/cm3.

Accepted Answer

A)  1.00 * 102 ft 
B)  18.8 mm 
C)  33.8 ft 
D)  76.0 cm 
E)  348 cm 
A)  1.00 * 102 ft 
B)  18.8 mm 
C)  33.8 ft 
D)  76.0 cm 
E)  348 cm

Question 5

The following data describes an initial and final state for an ideal gas. Given that the amount of gas does not change in the process, what is the final volume (mL) of the gas $\begin{array}{lllc}
&P&V&T\\hline
\text { initial: } & 720~ {\mathrm{mmHg}} & 235 {\mathrm{~mL}} & 25^{\circ} \mathrm{C} \
\text { final: } & 860~ \mathrm{mmHg} & ? & 15^{\circ} \mathrm{C}
\end{array}$

Accepted Answer

A)  170. mL 
B)  180. mL 
C)  190. mL 
D)  210. mL 
E)  None of the above 
A)  170. mL 
B)  180. mL 
C)  190. mL 
D)  210. mL 
E)  None of the above

Question 6

Which of these gas molecules has the highest average kinetic energy at 25$\circ$C

Accepted Answer

A)  H2 
B)  O2 
C)  N2 
D)  Cl2 
E)  All the gases have the same average kinetic energy. 
A)  H2 
B)  O2 
C)  N2 
D)  Cl2 
E)  All the gases have the same average kinetic energy.

Question 7

A spacecraft is filled with 0.500 atm of N2 and 0.500 atm of O2. Suppose a micrometeor strikes this spacecraft and puts a very small hole in its side. Under these circumstances,

Accepted Answer

A)  O2 is lost from the craft 6.9% faster than N2 is lost. 
B)  O2 is lost from the craft 14% faster than N2 is lost. 
C)  N2 is lost from the craft 6.9% faster than O2 is lost. 
D)  N2 is lost from the craft 14% faster than O2 is lost. 
E)  N2 and O2 are lost from the craft at the same rate. 
A)  O2 is lost from the craft 6.9% faster than N2 is lost. 
B)  O2 is lost from the craft 14% faster than N2 is lost. 
C)  N2 is lost from the craft 6.9% faster than O2 is lost. 
D)  N2 is lost from the craft 14% faster than O2 is lost. 
E)  N2 and O2 are lost from the craft at the same rate.

Question 8

Avogadro's Law states that at constant pressure and temperature, the volume of a gas is directly proportional to the number of moles of the gas present.

Accepted Answer

A) True 
 B)False

Question 9

9.45 g of liquid hexane (C6H14) is introduced into a 10.0 L vessel containing 13.15 atm of oxygen gas at 21ºC and ignited, yielding carbon dioxide and water. If the vessel is then cooled to -10.ºC, what will be the gas pressure inside the vessel

Accepted Answer

A)  1.42 atm 
B)  3.09 atm 
C)  10.9 atm 
D)  12.6 atm 
E)  13.15 atm 
A)  1.42 atm 
B)  3.09 atm 
C)  10.9 atm 
D)  12.6 atm 
E)  13.15 atm

Question 10

The pressure of a gas sample was measured to be 654 mmHg. What is the pressure in kPa (1 atm = 1.01325 * 105 Pa)

Accepted Answer

A)  87.2 kPa 
B)  8.72 * 104 kPa 
C)  118 kPa 
D)  8.72 * 107 kPa 
E)  6.63 * 104 kPa 
A)  87.2 kPa 
B)  8.72 * 104 kPa 
C)  118 kPa 
D)  8.72 * 107 kPa 
E)  6.63 * 104 kPa

What is the pressure of the sample of gas trapped in the open-tube mercury manometer shown below if atmospheric pressure is 736 mmHg and h = 9.2 cm

Charles Law states that the volume of a fixed amount of gas maintained at constant pressure is inversely proportional to the absolute temperature of the gas.

A 1.17 g sample of an alkane hydrocarbon gas occupies a volume of 674 mL at 28^$\circ$C and 741 mmHg. Alkanes are known to have the general formula C_nH_2n+2. What is the molecular formula of the gas in this sample (R = 0.08206 L * atm/K * mol)

A pressure that will support a column of Hg to a height of 256 mm would support a column of water to what height The density of mercury is 13.6 g/cm³; the density of water is 1.00 g/cm³.

The following data describes an initial and final state for an ideal gas. Given that the amount of gas does not change in the process, what is the final volume (mL) of the gas P V T initial: 720\nobreakspace 235 2 final: 860\nobreakspace ? 1

Which of these gas molecules has the highest average kinetic energy at 25^$\circ$C

A spacecraft is filled with 0.500 atm of N₂ and 0.500 atm of O₂. Suppose a micrometeor strikes this spacecraft and puts a very small hole in its side. Under these circumstances,

Avogadro's Law states that at constant pressure and temperature, the volume of a gas is directly proportional to the number of moles of the gas present.

9.45 g of liquid hexane (C₆H₁₄) is introduced into a 10.0 L vessel containing 13.15 atm of oxygen gas at 21ºC and ignited, yielding carbon dioxide and water. If the vessel is then cooled to -10.ºC, what will be the gas pressure inside the vessel

The pressure of a gas sample was measured to be 654 mmHg. What is the pressure in kPa (1 atm = 1.01325 * 10⁵ Pa)

Chemistry: The Study of Change

Atoms Molecules and Ions

Mass Relationships in Chemical Reactions

Reactions in Aqueous Solutions

Thermochemistry

Quantum Theory and the Electronic Structure of Atoms

Periodic Relationships Among the Elements

Chemical Bonding I: Basic Concepts

Chemical Bonding II: Molecular Geometry and Hybridization of Atomic

Intermolecular Forces and Liquids and Solids

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Entropy Free Energy and Equilibrium

Electrochemistry

Nuclear Chemistry

Chemistry in the Atmosphere

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Transition Metals Chemistry and Coordination Compounds

Organic Chemistry

Synthetic and Natural Organic Polymers

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Exam 5: Gases

What is the pressure of the sample of gas trapped in the open-tube mercury manometer shown below if atmospheric pressure is 736 mmHg and h = 9.2 cm

Charles Law states that the volume of a fixed amount of gas maintained at constant pressure is inversely proportional to the absolute temperature of the gas.

A 1.17 g sample of an alkane hydrocarbon gas occupies a volume of 674 mL at 28 ∘\circ∘ C and 741 mmHg. Alkanes are known to have the general formula CnH2n+2. What is the molecular formula of the gas in this sample (R = 0.08206 L * atm/K * mol)

A pressure that will support a column of Hg to a height of 256 mm would support a column of water to what height The density of mercury is 13.6 g/cm3; the density of water is 1.00 g/cm3.

The following data describes an initial and final state for an ideal gas. Given that the amount of gas does not change in the process, what is the final volume (mL) of the gas P V T initial: 720\nobreakspace 235 2 final: 860\nobreakspace ? 1

Which of these gas molecules has the highest average kinetic energy at 25 ∘\circ∘ C

A spacecraft is filled with 0.500 atm of N2 and 0.500 atm of O2. Suppose a micrometeor strikes this spacecraft and puts a very small hole in its side. Under these circumstances,

Avogadro's Law states that at constant pressure and temperature, the volume of a gas is directly proportional to the number of moles of the gas present.

9.45 g of liquid hexane (C6H14) is introduced into a 10.0 L vessel containing 13.15 atm of oxygen gas at 21ºC and ignited, yielding carbon dioxide and water. If the vessel is then cooled to -10.ºC, what will be the gas pressure inside the vessel

The pressure of a gas sample was measured to be 654 mmHg. What is the pressure in kPa (1 atm = 1.01325 * 105 Pa)

Chemistry: The Study of Change

Atoms Molecules and Ions

Mass Relationships in Chemical Reactions

Reactions in Aqueous Solutions

Thermochemistry

Quantum Theory and the Electronic Structure of Atoms

Periodic Relationships Among the Elements

Chemical Bonding I: Basic Concepts

Chemical Bonding II: Molecular Geometry and Hybridization of Atomic

Intermolecular Forces and Liquids and Solids

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Entropy Free Energy and Equilibrium

Electrochemistry

Nuclear Chemistry

Chemistry in the Atmosphere

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Transition Metals Chemistry and Coordination Compounds

Organic Chemistry

Synthetic and Natural Organic Polymers

Filters

A 1.17 g sample of an alkane hydrocarbon gas occupies a volume of 674 mL at 28^$\circ$C and 741 mmHg. Alkanes are known to have the general formula C_nH_2n+2. What is the molecular formula of the gas in this sample (R = 0.08206 L * atm/K * mol)

A pressure that will support a column of Hg to a height of 256 mm would support a column of water to what height The density of mercury is 13.6 g/cm³; the density of water is 1.00 g/cm³.

Which of these gas molecules has the highest average kinetic energy at 25^$\circ$C

A spacecraft is filled with 0.500 atm of N₂ and 0.500 atm of O₂. Suppose a micrometeor strikes this spacecraft and puts a very small hole in its side. Under these circumstances,

9.45 g of liquid hexane (C₆H₁₄) is introduced into a 10.0 L vessel containing 13.15 atm of oxygen gas at 21ºC and ignited, yielding carbon dioxide and water. If the vessel is then cooled to -10.ºC, what will be the gas pressure inside the vessel

The pressure of a gas sample was measured to be 654 mmHg. What is the pressure in kPa (1 atm = 1.01325 * 10⁵ Pa)