The root-mean-square speed of NO2 at 28.4 °C is ________ m/sec.

A) 404 B) 40.2 C) 124 D) 233 E) 12.8 A) 404 B) 40.2 C) 124 D) 233 E) 12.8

The density (in g/L)of CO2 at 1106.2 torr and 56.3 °C is ________.

A) 2.37 B) 1800 C) 13.9 D) 0.0234 E) 0.0538 A) 2.37 B) 1800 C) 13.9 D) 0.0234 E) 0.0538

Exam 10: Gases | Examlex

A vessel contained N₂, Ar, He, and Ne. The total pressure in the vessel was 987 torr. The partial pressures of nitrogen, argon, and helium were 44.0, 486, and 218 torr, respectively. The partial pressure of neon in the vessel was ________ torr.

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Question 1

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A fixed amount of gas at 25.0 °C occupies a volume of 10.0 L when the pressure is 751 torr. Use Boyle's law to calculate the pressure (torr)when the volume is reduced to 7.25 L at a constant temperature of 25.0 °C.

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Question 2

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The density of ________ is 1.70 g/L at STP.

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Question 3

Correct Answer:

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The root-mean-square speed of NO₂ at 28.4 °C is ________ m/sec.

(Multiple Choice)

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Question 4

Which statement about atmospheric pressure is false?

(Multiple Choice)

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Question 5

The density of nitric oxide (NO)gas at 0.970 atm and 34.9 °C is ________ g/L.

(Multiple Choice)

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Question 6

What is the partial pressure (in mm Hg)of neon in a 4.00 L vessel that contains 0.838 mol of methane, 0.184 mol of ethane, and 0.755 mol of neon at a total pressure of 928 mm Hg?

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Question 7

The volume of 0.43 mol of an ideal gas at 365 torr and 97 °C is ________ L.

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Question 8

The root-mean-square speed of CO at 113 °C is ________ m/s.

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Question 9

The pressure exerted by a column of liquid is equal to the product of the height of the column times the gravitational constant times the density of the liquid, P = ghd. How high a column of methanol (d = 0.79 g/mL)would be supported by a pressure that supports a 713 mm column of mercury (d = 13.6 g/mL)?

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Question 10

A sample of He gas (2.35 mol)occupies 57.9 L at 300.0 K and 1.00 atm. The volume of this sample is ________ L at 469 K and 1.00 atm.

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Question 11

A sample of O₂ gas (2.0 mmol)effused through a pinhole in 5.0 s. It will take ________ s for the same amount of CO₂ to effuse under the same conditions.

(Multiple Choice)

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Question 12

A helium balloon is filled to a volume of 27.7 L at 300 K. What will the volume of the balloon become if the balloon is heated to raise the temperature to 392 K?

(Multiple Choice)

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Question 13

A gas vessel is attached to an open-end manometer containing a nonvolatile liquid of density 0.791 g/mL as shown below. The difference in heights of the liquid in the two sides of the manometer is 43.4 cm when the atmospheric pressure is 755 mm Hg. Given that the density of mercury is 13.6 g/mL, the pressure of the enclosed gas is ________ atm.

(Multiple Choice)

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Question 14

The volume of hydrogen gas at 45.0 °C and 699 torr that can be produced by the reaction of 5.66 g of zinc with excess sulfuric acid is ________ L.

(Multiple Choice)

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Question 15

Arrange the following gases in order of increasing average molecular speed at 25 °C. Cl₂, O₂, F₂, N₂

(Multiple Choice)

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Question 16

A flask contains a mixture of He and Ne at a total pressure of 2.6 atm. There are 2.0 mol of He and 5.0 mol of Ne in the flask. The partial pressure of He is ________ atm.

(Multiple Choice)

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Question 17

The temperature and pressure specified by STP are °C and atm.

(Short Answer)

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Question 18

Of the following, ________ is a valid statement of Charles' law.

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Question 19

The density (in g/L)of CO₂ at 1106.2 torr and 56.3 °C is ________.

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Question 20

Showing 1 - 20 of 175

Exam 10: Gases

A vessel contained N2, Ar, He, and Ne. The total pressure in the vessel was 987 torr. The partial pressures of nitrogen, argon, and helium were 44.0, 486, and 218 torr, respectively. The partial pressure of neon in the vessel was ________ torr.

A fixed amount of gas at 25.0 °C occupies a volume of 10.0 L when the pressure is 751 torr. Use Boyle's law to calculate the pressure (torr)when the volume is reduced to 7.25 L at a constant temperature of 25.0 °C.

The density of ________ is 1.70 g/L at STP.

The root-mean-square speed of NO2 at 28.4 °C is ________ m/sec.

Which statement about atmospheric pressure is false?

The density of nitric oxide (NO)gas at 0.970 atm and 34.9 °C is ________ g/L.

What is the partial pressure (in mm Hg)of neon in a 4.00 L vessel that contains 0.838 mol of methane, 0.184 mol of ethane, and 0.755 mol of neon at a total pressure of 928 mm Hg?

The volume of 0.43 mol of an ideal gas at 365 torr and 97 °C is ________ L.

The root-mean-square speed of CO at 113 °C is ________ m/s.

A sample of He gas (2.35 mol)occupies 57.9 L at 300.0 K and 1.00 atm. The volume of this sample is ________ L at 469 K and 1.00 atm.

A sample of O2 gas (2.0 mmol)effused through a pinhole in 5.0 s. It will take ________ s for the same amount of CO2 to effuse under the same conditions.

A helium balloon is filled to a volume of 27.7 L at 300 K. What will the volume of the balloon become if the balloon is heated to raise the temperature to 392 K?

The volume of hydrogen gas at 45.0 °C and 699 torr that can be produced by the reaction of 5.66 g of zinc with excess sulfuric acid is ________ L.

Arrange the following gases in order of increasing average molecular speed at 25 °C. Cl2, O2, F2, N2

A flask contains a mixture of He and Ne at a total pressure of 2.6 atm. There are 2.0 mol of He and 5.0 mol of Ne in the flask. The partial pressure of He is ________ atm.

The temperature and pressure specified by STP are ________ °C and ________ atm.

Of the following, ________ is a valid statement of Charles' law.

The density (in g/L)of CO2 at 1106.2 torr and 56.3 °C is ________.

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A vessel contained N₂, Ar, He, and Ne. The total pressure in the vessel was 987 torr. The partial pressures of nitrogen, argon, and helium were 44.0, 486, and 218 torr, respectively. The partial pressure of neon in the vessel was ________ torr.

The root-mean-square speed of NO₂ at 28.4 °C is ________ m/sec.

A sample of O₂ gas (2.0 mmol)effused through a pinhole in 5.0 s. It will take ________ s for the same amount of CO₂ to effuse under the same conditions.

Arrange the following gases in order of increasing average molecular speed at 25 °C. Cl₂, O₂, F₂, N₂

The temperature and pressure specified by STP are °C and atm.

The density (in g/L)of CO₂ at 1106.2 torr and 56.3 °C is ________.