A ballerina weighs 103 lbs and is up on her toes with only 10.0 cm2 of her slippers in contact with the floor. What pressure is she exerting on the floor?

A) 4.59 *105 Pa B) 4.59 * 103 Pa C) 4.59 * 101 Pa D) 4.59 * 10¯1 Pa E) 4.59 * 10¯3 Pa A) 4.59 *105 Pa B) 4.59 * 103 Pa C) 4.59 * 101 Pa D) 4.59 * 10¯1 Pa E) 4.59 * 10¯3 Pa

At moderate pressures (~ 200 atm), the measured pressure exerted by CO2 gas is less than that predicted by the ideal gas equation. This is mainly because

A) such high pressures cannot be accurately measured. B) CO2 will condense to a liquid at 200 atm pressure. C) gas phase collisions prevent CO2 molecules from colliding with the walls of the container. D) of attractive intermolecular forces between CO2 molecules. E) the volume occupied by the CO2 molecules themselves becomes significant. A) such high pressures cannot be accurately measured. B) CO2 will condense to a liquid at 200 atm pressure. C) gas phase collisions prevent CO2 molecules from colliding with the walls of the container. D) of attractive intermolecular forces between CO2 molecules. E) the volume occupied by the CO2 molecules themselves becomes significant.

Exam 5: Gases and the Kinetic-Molecular Theory

Lithium oxide is an effective absorber of carbon dioxide and can be used to purify air in confined areas such as space vehicles. What volume of carbon dioxide can be absorbed by 1.00 kg of lithium oxide at 25 $\degree$ C and 1.00 atm? Li₂O(aq) + CO₂(g) $\rightarrow$ Li₂CO₃(s)

(Multiple Choice)

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Question 41

A ballerina weighs 103 lbs and is up on her toes with only 10.0 cm² of her slippers in contact with the floor. What pressure is she exerting on the floor?

(Multiple Choice)

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Question 42

Helium gas is being pumped into a rigid container at a constant temperature. As a result, the pressure of helium in the container is increasing. Select the one correct statement below.

(Multiple Choice)

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Question 43

A gas mixture, with a total pressure of 300. torr, consists of equal masses of Ne (atomic weight 20.)and Ar (atomic weight 40.). What is the partial pressure of Ar, in torr?

(Multiple Choice)

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Question 44

Which of the following changes will NOT affect the total pressure of gas in a container, assuming all other factors remain constant?

(Multiple Choice)

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Question 45

For real gases, PV > nRT, always.

(True/False)

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Question 46

According to the kinetic theory of gases, in a collision between two molecules the kinetic energy of one molecule will decrease by the same amount that the kinetic energy of the other one increases.

(True/False)

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Question 47

At moderate pressures (~ 200 atm), the measured pressure exerted by CO₂ gas is less than that predicted by the ideal gas equation. This is mainly because

(Multiple Choice)

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Question 48

Calculate the rms speed of carbon dioxide molecules at STP.

(Multiple Choice)

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Question 49

What is the pressure in a 7.50-L flask if 0.15 mol of carbon dioxide is added to 0.33 mol of oxygen? The temperature of the mixture is 48.0 $\degree$ C.

(Multiple Choice)

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Question 50

A 250.0-mL sample of ammonia, NH₃(g), exerts a pressure of 833 torr at 42.4 $\degree$ C. What mass of ammonia is in the container?

(Multiple Choice)

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Question 51

Nitrogen dioxide is a red-brown gas that is responsible for the color of photochemical smog. A sample of nitrogen dioxide has a volume of 28.6 L at 45.3 $\degree$ C and 89.9 kPa. What is its volume at STP?

(Multiple Choice)

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Question 52

Hydrogen gas exerts a pressure of 466 torr in a container. What is this pressure in atmospheres?

(Multiple Choice)

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Question 53

A compressed gas cylinder containing 1.50 mol methane has a volume of 3.30 L. What pressure does the methane exert on the walls of the cylinder if its temperature is 25 $\degree$ C?

(Multiple Choice)

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Question 54

At very high pressures (~ 1000 atm), the measured pressure exerted by real gases is greater than that predicted by the ideal gas equation. This is mainly because

(Multiple Choice)

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Question 55

"The volume of an ideal gas is directly proportional to its absolute temperature at constant pressure and number of moles" is a statement of ________________ Law.

(Multiple Choice)

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Question 56

Hydrochloric acid is prepared by bubbling hydrogen chloride gas through water. What is the concentration of a solution prepared by dissolving 225 L of HCl(g) at 37 $\degree$ C and 89.6 kPa in 5.25 L of water?

(Multiple Choice)

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Question 57

For a pure gas sample, the average kinetic energy is also the most probable kinetic energy.

(True/False)

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Question 58

Select the statement which does NOT apply to an ideal gas.

(Multiple Choice)

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Question 59

Which of the lines on the figure below is the best representation of the relationship between the volume of a gas and its absolute temperature, other factors remaining constant?

(Multiple Choice)

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Question 60

Showing 41 - 60 of 103

Exam 5: Gases and the Kinetic-Molecular Theory

Lithium oxide is an effective absorber of carbon dioxide and can be used to purify air in confined areas such as space vehicles. What volume of carbon dioxide can be absorbed by 1.00 kg of lithium oxide at 25 °\degree° C and 1.00 atm? Li2O(aq) + CO2(g) →\rightarrow→ Li2CO3(s)

A ballerina weighs 103 lbs and is up on her toes with only 10.0 cm2 of her slippers in contact with the floor. What pressure is she exerting on the floor?

Helium gas is being pumped into a rigid container at a constant temperature. As a result, the pressure of helium in the container is increasing. Select the one correct statement below.

A gas mixture, with a total pressure of 300. torr, consists of equal masses of Ne (atomic weight 20.)and Ar (atomic weight 40.). What is the partial pressure of Ar, in torr?

Which of the following changes will NOT affect the total pressure of gas in a container, assuming all other factors remain constant?

For real gases, PV > nRT, always.

According to the kinetic theory of gases, in a collision between two molecules the kinetic energy of one molecule will decrease by the same amount that the kinetic energy of the other one increases.

At moderate pressures (~ 200 atm), the measured pressure exerted by CO2 gas is less than that predicted by the ideal gas equation. This is mainly because

Calculate the rms speed of carbon dioxide molecules at STP.

What is the pressure in a 7.50-L flask if 0.15 mol of carbon dioxide is added to 0.33 mol of oxygen? The temperature of the mixture is 48.0 °\degree° C.

A 250.0-mL sample of ammonia, NH3(g), exerts a pressure of 833 torr at 42.4 °\degree° C. What mass of ammonia is in the container?

Nitrogen dioxide is a red-brown gas that is responsible for the color of photochemical smog. A sample of nitrogen dioxide has a volume of 28.6 L at 45.3 °\degree° C and 89.9 kPa. What is its volume at STP?

Hydrogen gas exerts a pressure of 466 torr in a container. What is this pressure in atmospheres?

A compressed gas cylinder containing 1.50 mol methane has a volume of 3.30 L. What pressure does the methane exert on the walls of the cylinder if its temperature is 25 °\degree° C?

At very high pressures (~ 1000 atm), the measured pressure exerted by real gases is greater than that predicted by the ideal gas equation. This is mainly because

"The volume of an ideal gas is directly proportional to its absolute temperature at constant pressure and number of moles" is a statement of ________________ Law.

Hydrochloric acid is prepared by bubbling hydrogen chloride gas through water. What is the concentration of a solution prepared by dissolving 225 L of HCl(g) at 37 °\degree° C and 89.6 kPa in 5.25 L of water?

For a pure gas sample, the average kinetic energy is also the most probable kinetic energy.

Select the statement which does NOT apply to an ideal gas.

Which of the lines on the figure below is the best representation of the relationship between the volume of a gas and its absolute temperature, other factors remaining constant?

Keys to the Study of Chemistry

The Components of Matter

Stoichiometry of Formulas and Equations

Three Major Classes of Chemical Reactions

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 the Direction of Chemical Reactions

Electrochemistry: Chemical Change and Electrical Work

The Elements in Nature and Industry

The Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

Filters

Lithium oxide is an effective absorber of carbon dioxide and can be used to purify air in confined areas such as space vehicles. What volume of carbon dioxide can be absorbed by 1.00 kg of lithium oxide at 25 $\degree$ C and 1.00 atm? Li₂O(aq) + CO₂(g) $\rightarrow$ Li₂CO₃(s)

A ballerina weighs 103 lbs and is up on her toes with only 10.0 cm² of her slippers in contact with the floor. What pressure is she exerting on the floor?

At moderate pressures (~ 200 atm), the measured pressure exerted by CO₂ gas is less than that predicted by the ideal gas equation. This is mainly because

What is the pressure in a 7.50-L flask if 0.15 mol of carbon dioxide is added to 0.33 mol of oxygen? The temperature of the mixture is 48.0 $\degree$ C.

A 250.0-mL sample of ammonia, NH₃(g), exerts a pressure of 833 torr at 42.4 $\degree$ C. What mass of ammonia is in the container?

Nitrogen dioxide is a red-brown gas that is responsible for the color of photochemical smog. A sample of nitrogen dioxide has a volume of 28.6 L at 45.3 $\degree$ C and 89.9 kPa. What is its volume at STP?

A compressed gas cylinder containing 1.50 mol methane has a volume of 3.30 L. What pressure does the methane exert on the walls of the cylinder if its temperature is 25 $\degree$ C?

Hydrochloric acid is prepared by bubbling hydrogen chloride gas through water. What is the concentration of a solution prepared by dissolving 225 L of HCl(g) at 37 $\degree$ C and 89.6 kPa in 5.25 L of water?