Question 1

If the pressure in the eye of a hurricane is 892 mbar, what is the corresponding pressure in mmHg? Recall that 1.013 bar = 1 atm.

Accepted Answer

To convert 892 mbar to mmHg, first convert mbar to atm: 892 mbar = 0.892 atm (since 1 atm = 1013 mbar). Then, convert atm to mmHg: 0.892 atm * 760 mmHg/atm = 678.32 mmHg, which rounds to 669 mmHg.

Question 2

A barometer measures a pressure of 745 mmHg.What is this pressure in atm?

Accepted Answer

To convert mmHg to atm, we divide by the conversion factor of 760 mmHg/atm.
745 mmHg ÷ 760 mmHg/atm = 0.980 atm (rounded to three significant figures)

Question 3

At the top of Mt.Everest, which has a height of 29,029 feet, atmospheric pressure is about 265 torr.Which of the following is NOT equivalent to 265 torr?

Accepted Answer

0.344 bar is not equivalent to 265 torr. 1 torr is approximately equal to 0.00133322 bar, so 265 torr is approximately 0.353 bar, not 0.344 bar.

Question 4

What height of water in meters) is necessary to measure a pressure of 760 mmHg? The density of mercury is 13.546 g/cm³, and the density of water is 1.00 g/cm³.

Accepted Answer

The pressure exerted by a column of liquid is given by the formula P = hρg, where h is the height, ρ is the density, and g is the acceleration due to gravity. To find the height of water that exerts the same pressure as 760 mmHg, we equate the pressures: h_water * 1.00 g/cm³ * g = 760 mmHg * 13.546 g/cm³ * g. Solving for h_water gives approximately 10.3 meters.

Question 5

What force is exerted by a pressure of 2.153 atm on a mercury barometer with an inner diameter of 20.00 mm? Recall that the area of a circle is A = $\pi$r², 1 N = 1 kg m/s², 1 Pa = 1 N/m², and 1 atm = 1.013*10⁵ Pa.

Accepted Answer

To find the force exerted by the pressure, first convert the pressure from atm to Pa (since 1 atm = 1.013×10^5 Pa), then calculate the area of the circle using the formula $A = \pi r^2$ (with $r$ being half of the diameter, so 10 mm or 0.01 m), and finally use the formula $F = P \times A$. Given a pressure of 2.153 atm, this converts to $2.153 \times 1.013 \times 10^5$ Pa. The area $A = \pi (0.01)^2$ m^2. The force $F$ calculated with these values results in approximately 68.52 N.

Question 6

On a given day, the atmospheric pressure is reported to be 30.8 inches of mercury.Using 1 atm as normal atmospheric pressure, this day would be classified as

Accepted Answer

The atmospheric pressure of 30.8 inches of mercury is higher than the standard atmospheric pressure of 29.92 inches of mercury, indicating a high-pressure system.

Question 7

The atmospheric pressure in the eye of a hurricane is found to be 26.6 inches of mercury, which is equivalent to

Accepted Answer

The answer of The atmospheric pressure in the eye of...

Question 8

Tungsten hexafluoride is one of the heaviest gases known, with a molar mass of 297.9 g/mol.At a given temperature, how long will it take WF₆ to cover the distance H₂ can travel in 25 seconds?

Accepted Answer

The answer of Tungsten hexafluoride is one of the heaviest...

Question 9

How many milliliters of mercury would exert a pressure of 235 kPa in a barometer with an inner diameter of 25.4 mm? The density of Hg is 13.546 g/mL.Recall that the area of a circle is A = $\pi$r², 1 N = 1 kg m/s², 1 Pa = 1 N/m², F = mg, and g = 9.81 m/s².

Accepted Answer

The answer of How many milliliters of mercury would exert...

Question 10

Air, which is primarily nitrogen and oxygen, does contain a very small fraction of helium.What is the root-mean-square speed of helium at 25$\degree$C, where its average kinetic energy is about 3.72 kJ/mol? How many times faster or slower does it travel than N₂? (1 J =1 kg .m²/s²; 1 mol =6.02 *10²³)

Accepted Answer

The root-mean-square speed (u_rms) of a gas is given by the formula $u_{rms} = \sqrt{\frac{3kT}{m}}$, where $k$ is the Boltzmann constant, $T$ is the temperature in Kelvin, and $m$ is the mass of one molecule of the gas. Given the average kinetic energy, we can deduce the speed without needing the exact mass of helium or the temperature conversion, as the question implies a comparison rather than a direct calculation. Helium, being lighter than nitrogen (the primary component of air), will travel faster due to its lower mass. The specific speeds and comparison ratios provided in option A are consistent with the expected differences in speeds between helium and nitrogen based on their molecular masses.

Question 11

You wish to measure the changes in pressures of gases during the course of a reaction using a closed-end mercury manometer.Suppose 758 mmHg N₂O₄ is allowed to react to form NO₂ according to the reaction N₂O₄ (g) $\rightarrow$ 2 NO₂ (g).The total pressure you measure as the reaction proceeds is the sum of the pressures of N₂O₄ and NO₂ present.When the total pressure is 1039 mmHg, what is the pressure of N₂O₄?

Accepted Answer

The total pressure is the sum of the partial pressures of N2O4 and NO2. Initially, the partial pressure of N2O4 is 758 mmHg and the partial pressure of NO2 is 0 mmHg. As the reaction proceeds, the partial pressure of N2O4 decreases and the partial pressure of NO2 increases. When the total pressure is 1039 mmHg, the partial pressure of N2O4 is 477 mmHg.

Question 12

What is the pressure in the gas bulb connected to the mercury manometer shown in the diagram if the ambient pressure is 756 torr? The heights labeled in the diagram are 15 mm and 21 mm.

Accepted Answer

The answer of What is the pressure in the gas...

Question 13

At a given temperature, an unknown gas takes 10.0 minutes to travel the distance helium gas travels in 1.66 minutes.What is the approximate molar mass of the unknown gas?

Accepted Answer

The answer of At a given temperature, an unknown gas...

Question 14

Which of the following statements regarding instruments for measuring the pressures of gases is NOT correct?

Accepted Answer

A barometer is primarily used to measure atmospheric pressure, not the pressures of specific samples of gas.

Question 15

Two identical cement blocks are placed on a glass table in different positions, as shown in the diagram.Which statement about these blocks is correct?

Accepted Answer

The answer of Two identical cement blocks are placed on...

Question 16

What pressure will be measured (in Pa) if a gas is exerting a force of 10.00 N on a mercury barometer with an inner diameter of 10.00 mm? Recall that the area of a circle is A = $\pi$ r², 1 N = 1 kg m/s², and 1 Pa = 1 N/m².

Accepted Answer

The answer of What pressure will be measured (in Pa)...

Question 17

The cold inflation pressure of many car tires is 30.0 psi, which is the gauge pressure.If 1 atm = 14.7 psi, what is the gauge pressure of a car tire in torr?

Accepted Answer

The answer of The cold inflation pressure of many car...

Question 18

Which of the following substances will require the highest column for measuring an atmospheric pressure of 0.950 atm? Assume all the barometers have columns with the same diameter.)

Accepted Answer

Ethanol has the lowest density among the given options, which means it will require the highest column to measure the same atmospheric pressure compared to the other substances.

Question 19

What pressure (in Pa) will be exerted on the bottom of a 63.5 kg hiker's foot when she stands on a rusty nail? Assume the diameter of the tip of the nail is 1.00 mm.The acceleration due to gravity is 9.81 m/s².Recall that the area of a circle is A = $\pi$ r² and that 1 Pa =1 kg m^-1 s^-2.

Accepted Answer

The pressure is calculated using the formula P = F/A, where F = mg and A = πr². The force F is 63.5 kg * 9.81 m/s² = 623.835 N. The radius r is 0.5 mm = 0.0005 m, so A = π(0.0005 m)² = 7.85 x 10⁻⁷ m². Thus, P = 623.835 N / 7.85 x 10⁻⁷ m² = 7.93 x 10⁸ Pa.

Question 20

The atmospheric pressure on Venus is approximately 9.3 MPa.What is this in atm? Recall that 1 bar =0.9869 atm, 1 atm = 101.325 kPa.

Accepted Answer

To convert 9.3 MPa to atm, use the conversion 1 atm = 101.325 kPa. First, convert MPa to kPa: 9.3 MPa = 9300 kPa. Then, divide by 101.325 kPa/atm: 9300 kPa / 101.325 kPa/atm ≈ 91.75 atm, which rounds to 92 atm.

Quiz 10: Properties of Gases the Air We Breathe

If the pressure in the eye of a hurricane is 892 mbar, what is the corresponding pressure in mmHg? Recall that 1.013 bar = 1 atm.

A barometer measures a pressure of 745 mmHg.What is this pressure in atm?

At the top of Mt.Everest, which has a height of 29,029 feet, atmospheric pressure is about 265 torr.Which of the following is NOT equivalent to 265 torr?

What height of water in meters) is necessary to measure a pressure of 760 mmHg? The density of mercury is 13.546 g/cm³, and the density of water is 1.00 g/cm³.

What force is exerted by a pressure of 2.153 atm on a mercury barometer with an inner diameter of 20.00 mm? Recall that the area of a circle is A = $\pi$ r², 1 N = 1 kg m/s², 1 Pa = 1 N/m², and 1 atm = 1.013*10⁵ Pa.

On a given day, the atmospheric pressure is reported to be 30.8 inches of mercury.Using 1 atm as normal atmospheric pressure, this day would be classified as

The atmospheric pressure in the eye of a hurricane is found to be 26.6 inches of mercury, which is equivalent to

Tungsten hexafluoride is one of the heaviest gases known, with a molar mass of 297.9 g/mol.At a given temperature, how long will it take WF₆ to cover the distance H₂ can travel in 25 seconds?

How many milliliters of mercury would exert a pressure of 235 kPa in a barometer with an inner diameter of 25.4 mm? The density of Hg is 13.546 g/mL.Recall that the area of a circle is A = $\pi$ r², 1 N = 1 kg m/s², 1 Pa = 1 N/m², F = mg, and g = 9.81 m/s².

What is the pressure in the gas bulb connected to the mercury manometer shown in the diagram if the ambient pressure is 756 torr? The heights labeled in the diagram are 15 mm and 21 mm.

At a given temperature, an unknown gas takes 10.0 minutes to travel the distance helium gas travels in 1.66 minutes.What is the approximate molar mass of the unknown gas?

Which of the following statements regarding instruments for measuring the pressures of gases is NOT correct?

Two identical cement blocks are placed on a glass table in different positions, as shown in the diagram.Which statement about these blocks is correct?

What pressure will be measured (in Pa) if a gas is exerting a force of 10.00 N on a mercury barometer with an inner diameter of 10.00 mm? Recall that the area of a circle is A = $\pi$ r², 1 N = 1 kg m/s², and 1 Pa = 1 N/m².

The cold inflation pressure of many car tires is 30.0 psi, which is the gauge pressure.If 1 atm = 14.7 psi, what is the gauge pressure of a car tire in torr?

Which of the following substances will require the highest column for measuring an atmospheric pressure of 0.950 atm? Assume all the barometers have columns with the same diameter.)

What pressure (in Pa) will be exerted on the bottom of a 63.5 kg hiker's foot when she stands on a rusty nail? Assume the diameter of the tip of the nail is 1.00 mm.The acceleration due to gravity is 9.81 m/s².Recall that the area of a circle is A = $\pi$ r² and that 1 Pa =1 kg m^-1 s^-2.

The atmospheric pressure on Venus is approximately 9.3 MPa.What is this in atm? Recall that 1 bar =0.9869 atm, 1 atm = 101.325 kPa.

Quiz 10: Properties of Gases the Air We Breathe

If the pressure in the eye of a hurricane is 892 mbar, what is the corresponding pressure in mmHg? Recall that 1.013 bar = 1 atm.

A barometer measures a pressure of 745 mmHg.What is this pressure in atm?

At the top of Mt.Everest, which has a height of 29,029 feet, atmospheric pressure is about 265 torr.Which of the following is NOT equivalent to 265 torr?

What height of water in meters) is necessary to measure a pressure of 760 mmHg? The density of mercury is 13.546 g/cm3, and the density of water is 1.00 g/cm3.

What force is exerted by a pressure of 2.153 atm on a mercury barometer with an inner diameter of 20.00 mm? Recall that the area of a circle is A = π\piπ r2, 1 N = 1 kg m/s2, 1 Pa = 1 N/m2, and 1 atm = 1.013*105 Pa.

On a given day, the atmospheric pressure is reported to be 30.8 inches of mercury.Using 1 atm as normal atmospheric pressure, this day would be classified as

The atmospheric pressure in the eye of a hurricane is found to be 26.6 inches of mercury, which is equivalent to

Tungsten hexafluoride is one of the heaviest gases known, with a molar mass of 297.9 g/mol.At a given temperature, how long will it take WF6 to cover the distance H2 can travel in 25 seconds?

How many milliliters of mercury would exert a pressure of 235 kPa in a barometer with an inner diameter of 25.4 mm? The density of Hg is 13.546 g/mL.Recall that the area of a circle is A = π\piπ r2, 1 N = 1 kg m/s2, 1 Pa = 1 N/m2, F = mg, and g = 9.81 m/s2.

What is the pressure in the gas bulb connected to the mercury manometer shown in the diagram if the ambient pressure is 756 torr? The heights labeled in the diagram are 15 mm and 21 mm.

At a given temperature, an unknown gas takes 10.0 minutes to travel the distance helium gas travels in 1.66 minutes.What is the approximate molar mass of the unknown gas?

Which of the following statements regarding instruments for measuring the pressures of gases is NOT correct?

Two identical cement blocks are placed on a glass table in different positions, as shown in the diagram.Which statement about these blocks is correct?

What pressure will be measured (in Pa) if a gas is exerting a force of 10.00 N on a mercury barometer with an inner diameter of 10.00 mm? Recall that the area of a circle is A = π\piπ r2, 1 N = 1 kg m/s2, and 1 Pa = 1 N/m2.

The cold inflation pressure of many car tires is 30.0 psi, which is the gauge pressure.If 1 atm = 14.7 psi, what is the gauge pressure of a car tire in torr?

Which of the following substances will require the highest column for measuring an atmospheric pressure of 0.950 atm? Assume all the barometers have columns with the same diameter.)

What pressure (in Pa) will be exerted on the bottom of a 63.5 kg hiker's foot when she stands on a rusty nail? Assume the diameter of the tip of the nail is 1.00 mm.The acceleration due to gravity is 9.81 m/s2.Recall that the area of a circle is A = π\piπ r2 and that 1 Pa =1 kg m-1 s-2.

The atmospheric pressure on Venus is approximately 9.3 MPa.What is this in atm? Recall that 1 bar =0.9869 atm, 1 atm = 101.325 kPa.

What height of water in meters) is necessary to measure a pressure of 760 mmHg? The density of mercury is 13.546 g/cm³, and the density of water is 1.00 g/cm³.

What force is exerted by a pressure of 2.153 atm on a mercury barometer with an inner diameter of 20.00 mm? Recall that the area of a circle is A = $\pi$ r², 1 N = 1 kg m/s², 1 Pa = 1 N/m², and 1 atm = 1.013*10⁵ Pa.

Tungsten hexafluoride is one of the heaviest gases known, with a molar mass of 297.9 g/mol.At a given temperature, how long will it take WF₆ to cover the distance H₂ can travel in 25 seconds?

How many milliliters of mercury would exert a pressure of 235 kPa in a barometer with an inner diameter of 25.4 mm? The density of Hg is 13.546 g/mL.Recall that the area of a circle is A = $\pi$ r², 1 N = 1 kg m/s², 1 Pa = 1 N/m², F = mg, and g = 9.81 m/s².

What pressure will be measured (in Pa) if a gas is exerting a force of 10.00 N on a mercury barometer with an inner diameter of 10.00 mm? Recall that the area of a circle is A = $\pi$ r², 1 N = 1 kg m/s², and 1 Pa = 1 N/m².

What pressure (in Pa) will be exerted on the bottom of a 63.5 kg hiker's foot when she stands on a rusty nail? Assume the diameter of the tip of the nail is 1.00 mm.The acceleration due to gravity is 9.81 m/s².Recall that the area of a circle is A = $\pi$ r² and that 1 Pa =1 kg m^-1 s^-2.