What is the molar mass of an unknown gas if a sample weighing 0.389 g is collected in a flask with a volume of 102 cm3 at 97°C and at a pressure of 728 mmHg? (R = 0.08206 L • atm/K • mol,1 atm = 760 mmHg).

A) 187 g/mol B) 121 g/mol C) 112 g/mol D) 31.6 g/mol E) 8.28 × 10-3 g/mol A) 187 g/mol B) 121 g/mol C) 112 g/mol D) 31.6 g/mol E) 8.28 × 10-3 g/mol

What is the volume of NH3 produced in the following reaction when 3.0 L of N2 reacts with 4.0 L of H2 ? N2(g)+ 3H2(g)→ 2NH3(g)

A) 1.5 L B) 2.7 L C) 6.0 L D) 7.5 L E) 12 L A) 1.5 L B) 2.7 L C) 6.0 L D) 7.5 L E) 12 L

Determine the molar mass of Freon-11 gas if a sample weighing 0.597 g occupies 100 cm3 at 95°C and 1000 mmHg (R = 0.08206 L • atm/K • mol,1 atm = 760 mmHg).

A) 0.19 g/mol B) 35.3 g/mol C) 70.9 g/mol D) 137 g/mol E) 384 g/mol A) 0.19 g/mol B) 35.3 g/mol C) 70.9 g/mol D) 137 g/mol E) 384 g/mol

A sample of N2 gas occupies 2.40 L at 20°C.At what temperature will the N2 gas occupy a volume of 4.80 L at constant pressure?

A) 10°C B) 40°C C) 146°C D) 313°C E) 586°C A) 10°C B) 40°C C) 146°C D) 313°C E) 586°C

Exam 10: Gases | Examlex

What is the molar mass of an unknown gas if a sample weighing 0.389 g is collected in a flask with a volume of 102 cm³ at 97°C and at a pressure of 728 mmHg? (R = 0.08206 L • atm/K • mol,1 atm = 760 mmHg).

(Multiple Choice)

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Question 41

What is the formula which describes the relationship between the volume and number of moles in the sample at constant pressure and constant temperature?

(Multiple Choice)

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Question 42

A fixed quantity of gas,initially at 600ºC,undergoes a temperature change at constant pressure in a cylinder with a movable piston.What final temperature of the gas can result in the change of state depicted below?

(Multiple Choice)

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Question 43

The catalytic decomposition of hydrogen peroxide yields oxygen gas and water.In an experiment,decomposition of hydrogen peroxide yielded 75.3 mL of gas collected over water at 25°C and 742 torr.What mass of oxygen gas was collected? (P_water = 24 torr at 25°C,R = 0.08206 L • atm/K • mol)

(Multiple Choice)

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Question 44

What is the formula which describes the relationship between the pressure,volume,temperature,and moles?

(Multiple Choice)

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Question 45

A sample of a gas occupies 1.40 L at 25°C and 760 mmHg.What volume will it occupy at the same temperature and 380 mmHg?

(Multiple Choice)

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Question 46

What is the volume of NH₃ produced in the following reaction when 3.0 L of N₂ reacts with 4.0 L of H₂ ? N₂(g)+ 3H₂(g)→ 2NH₃(g)

(Multiple Choice)

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Question 47

Select the gas with the highest average kinetic energy per mole at 298 K.

(Multiple Choice)

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Question 48

A sample of gas occupies 24.5 L at a pressure of 1.57 atm.What is the pressure if the volume is increased to 48.3 L at constant temperature?

(Multiple Choice)

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Question 49

Determine the molar mass of Freon-11 gas if a sample weighing 0.597 g occupies 100 cm³ at 95°C and 1000 mmHg (R = 0.08206 L • atm/K • mol,1 atm = 760 mmHg).

(Multiple Choice)

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Question 50

A sample of nitrogen gas has a volume of 32.4 L at 20°C.The gas is heated to 220ºC at constant pressure.What is the final volume of the nitrogen gas?

(Multiple Choice)

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Question 51

If 25.5 L of oxygen are cooled from 150°C to 50°C at constant pressure,what is the new volume of oxygen?

(Multiple Choice)

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Question 52

"The volume of an ideal gas is directly proportional to the number of moles of the gas at constant temperature and pressure" is a statement of _____________ law.

(Multiple Choice)

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Question 53

For a substance that remains a gas under the conditions listed,deviation from the ideal gas law would be most pronounced at

(Multiple Choice)

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Question 54

A(n)___________ is an instrument used to measure the atmospheric pressure.

(Short Answer)

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Question 55

A sample of N₂ gas occupies 2.40 L at 20°C.At what temperature will the N₂ gas occupy a volume of 4.80 L at constant pressure?

(Multiple Choice)

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Question 56

Which figure best represents the concept of pressure? (A sphere represents a gaseous atom.)

(Multiple Choice)

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Question 57

If 2.38 mol of a gas has a volume of 120.0 mL,what is the volume of 1.97 mol of the gas at the same temperature and pressure?

(Multiple Choice)

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Question 58

Which statement is false?

(Multiple Choice)

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Question 59

Arrange the following gases in order of increasing rate of effusion: C₂H₆,Ar,HCl,and PH₃.

(Multiple Choice)

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Question 60

Showing 41 - 60 of 131

Exam 10: Gases

What is the molar mass of an unknown gas if a sample weighing 0.389 g is collected in a flask with a volume of 102 cm3 at 97°C and at a pressure of 728 mmHg? (R = 0.08206 L • atm/K • mol,1 atm = 760 mmHg).

What is the formula which describes the relationship between the volume and number of moles in the sample at constant pressure and constant temperature?

A fixed quantity of gas,initially at 600ºC,undergoes a temperature change at constant pressure in a cylinder with a movable piston.What final temperature of the gas can result in the change of state depicted below?

The catalytic decomposition of hydrogen peroxide yields oxygen gas and water.In an experiment,decomposition of hydrogen peroxide yielded 75.3 mL of gas collected over water at 25°C and 742 torr.What mass of oxygen gas was collected? (Pwater = 24 torr at 25°C,R = 0.08206 L • atm/K • mol)

What is the formula which describes the relationship between the pressure,volume,temperature,and moles?

A sample of a gas occupies 1.40 L at 25°C and 760 mmHg.What volume will it occupy at the same temperature and 380 mmHg?

What is the volume of NH3 produced in the following reaction when 3.0 L of N2 reacts with 4.0 L of H2 ? N2(g)+ 3H2(g)→ 2NH3(g)

Select the gas with the highest average kinetic energy per mole at 298 K.

A sample of gas occupies 24.5 L at a pressure of 1.57 atm.What is the pressure if the volume is increased to 48.3 L at constant temperature?

Determine the molar mass of Freon-11 gas if a sample weighing 0.597 g occupies 100 cm3 at 95°C and 1000 mmHg (R = 0.08206 L • atm/K • mol,1 atm = 760 mmHg).

A sample of nitrogen gas has a volume of 32.4 L at 20°C.The gas is heated to 220ºC at constant pressure.What is the final volume of the nitrogen gas?

If 25.5 L of oxygen are cooled from 150°C to 50°C at constant pressure,what is the new volume of oxygen?

"The volume of an ideal gas is directly proportional to the number of moles of the gas at constant temperature and pressure" is a statement of _____________ law.

For a substance that remains a gas under the conditions listed,deviation from the ideal gas law would be most pronounced at

A(n)___________ is an instrument used to measure the atmospheric pressure.

A sample of N2 gas occupies 2.40 L at 20°C.At what temperature will the N2 gas occupy a volume of 4.80 L at constant pressure?

Which figure best represents the concept of pressure? (A sphere represents a gaseous atom.)

If 2.38 mol of a gas has a volume of 120.0 mL,what is the volume of 1.97 mol of the gas at the same temperature and pressure?

Which statement is false?

Arrange the following gases in order of increasing rate of effusion: C2H6,Ar,HCl,and PH3.

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What is the molar mass of an unknown gas if a sample weighing 0.389 g is collected in a flask with a volume of 102 cm³ at 97°C and at a pressure of 728 mmHg? (R = 0.08206 L • atm/K • mol,1 atm = 760 mmHg).

The catalytic decomposition of hydrogen peroxide yields oxygen gas and water.In an experiment,decomposition of hydrogen peroxide yielded 75.3 mL of gas collected over water at 25°C and 742 torr.What mass of oxygen gas was collected? (P_water = 24 torr at 25°C,R = 0.08206 L • atm/K • mol)

What is the volume of NH₃ produced in the following reaction when 3.0 L of N₂ reacts with 4.0 L of H₂ ? N₂(g)+ 3H₂(g)→ 2NH₃(g)

Determine the molar mass of Freon-11 gas if a sample weighing 0.597 g occupies 100 cm³ at 95°C and 1000 mmHg (R = 0.08206 L • atm/K • mol,1 atm = 760 mmHg).

A sample of N₂ gas occupies 2.40 L at 20°C.At what temperature will the N₂ gas occupy a volume of 4.80 L at constant pressure?

Arrange the following gases in order of increasing rate of effusion: C₂H₆,Ar,HCl,and PH₃.