Question 1

At 298 K which is larger rate of effusion or rate of diffusion?

Accepted Answer

The answer of At 298 K which is larger rate...

Question 2

The pressure in a container of gas connected to an open-end mercury manometer in which the mercury level is 22 cm lower in the side open to the atmosphere and the atmospheric pressure is
734 mm Hg is ________ mm Hg.

Accepted Answer

The answer of The pressure in a container of gas...

Question 3

Which of the following is not equivalent to 1 atm pressure?

Accepted Answer

A) 10 cm Hg 
B) 14.7 lb/in2 
C) 101 kPa 
D) 760 mm Hg 
A) 10 cm Hg 
B) 14.7 lb/in2 
C) 101 kPa 
D) 760 mm Hg

Question 4

If the Earth's ozone (O3)layer has a total volume of 1.00 × 1020 km3,a partial pressure of 1.6 × 10-9 atm,and an average temperature of 230 K,how many ozone molecules are in the Earth's ozone layer?

Accepted Answer

A) 2)3 × 1035 molecules 
B) 5)1 × 1035 molecules 
C) 2)3 × 1045 molecules 
D) 5)1 × 1045 molecules 
A) 2)3 × 1035 molecules 
B) 5)1 × 1035 molecules 
C) 2)3 × 1045 molecules 
D) 5)1 × 1045 molecules

Question 5

A 1.75 L container filled with CO2 gas at 25°C and 225 kPa pressure springs a leak.When the container is re-sealed,the pressure is 185 kPA and the temperature is 10°C.How many moles of gas were lost?

Accepted Answer

A) 0)0213 mol 
B) 0)463 mol 
C) 0)561 mol 
D) 2)16 mol 
A) 0)0213 mol 
B) 0)463 mol 
C) 0)561 mol 
D) 2)16 mol

Question 6

Carbon dioxide is a gas which causes environmental concern because of the greenhouse effect.What is the approximate percentage (by volume)of CO2 in the atmosphere?

Accepted Answer

A) less than 0.1% 
B) about 1% 
C) about 10% 
D) more than 20% 
A) less than 0.1% 
B) about 1% 
C) about 10% 
D) more than 20%

Question 7

A basketball is inflated to a pressure of 1.90 atm in a 24.0°C garage.What is the pressure of the basketball outside where the temperature is - 1.00°C?

Accepted Answer

A) 1)74 atm 
B) 1)80 atm 
C) 2)00 atm 
D) 2)08 atm 
A) 1)74 atm 
B) 1)80 atm 
C) 2)00 atm 
D) 2)08 atm

Question 8

When pressure-volume measurements are made on 1.0 mol of gas at constant temperature,a plot V versus P results in a

Accepted Answer

A) hyperbola. 
B) parabola. 
C) sine curve. 
D) straight line. 
A) hyperbola. 
B) parabola. 
C) sine curve. 
D) straight line.

Question 9

You are given two flasks of equal volume.One contains H2 at 0°C and 1 atm while the other contains CO2 at 0°C and 2 atm.Which of the following quantities will be the same for both flasks?

Accepted Answer

A) average molecular kinetic energy 
B) average molecular speed 
C) density 
D) number of molecules present 
A) average molecular kinetic energy 
B) average molecular speed 
C) density 
D) number of molecules present

Question 10

A balloon filled with helium gas at 20 °C occupies 4.91 L at 1.00 atm.The balloon is immersed in liquid nitrogen at -196°C,raising the pressure to 5.20 atm.What is the volume of the balloon in the liquid nitrogen?

Accepted Answer

A) 0)25 L 
B) 3)6 L 
C) 6)7 L 
D) 97 L 
A) 0)25 L 
B) 3)6 L 
C) 6)7 L 
D) 97 L

Question 11

Which law does the equation,  
= k represent?

Accepted Answer

A) Avogadro's law 
B) Boyle's law 
C) Charles' law 
D) Graham's law 
A) Avogadro's law 
B) Boyle's law 
C) Charles' law 
D) Graham's law

Question 12

A 1.000 kg sample of nitroglycerine,C3H5N3O9,explodes and releases gases with a temperature of 1985°C at 1.100 atm.What is the volume of gas produced?
4 C3H5N3O9(s)→ 12 CO2(g)+ 10 H2O(g)+ 6 N2(g)+ O2(g)

Accepted Answer

A) 742.2 L 
B) 3525 L 
C) 4730 L 
D) 5378 L 
A) 742.2 L 
B) 3525 L 
C) 4730 L 
D) 5378 L

Question 13

Which of the noble gases should show the greatest deviation from the ideal gas law at high pressures?

Accepted Answer

A) He 
B) Ar 
C) Rn 
D) All deviate equally. 
A) He 
B) Ar 
C) Rn 
D) All deviate equally.

Question 14

A 4.00-L flask contains nitrogen gas at 25°C and 1.00 atm pressure.What is the final pressure in the flask if an additional 2.00 g of N2 gas is added to the flask and the flask cooled to -55°C?

Accepted Answer

A) 0)319 atm 
B) 1)05 atm 
C) 1)44 atm 
D) 1)96 atm 
A) 0)319 atm 
B) 1)05 atm 
C) 1)44 atm 
D) 1)96 atm

Question 15

-What is the pressure (in mm Hg)of the gas inside the above apparatus if the outside pressure,Patm,is 750 mm Hg and the difference in mercury levels,Δh,is 50 mm Hg?

Accepted Answer

A) 50 mm Hg 
B) 700 mm Hg 
C) 750 mm Hg 
D) 800 mm Hg 
A) 50 mm Hg 
B) 700 mm Hg 
C) 750 mm Hg 
D) 800 mm Hg

Question 16

What is the average speed (actually the root-mean-square speed)of a neon atom at 27°C?

Accepted Answer

A) 5)78 m/s 
B) 19.3 m/s 
C) 183 m/s 
D) 609 m/s 
A) 5)78 m/s 
B) 19.3 m/s 
C) 183 m/s 
D) 609 m/s

Question 17

An approximation of absolute zero was made from an extrapolation of

Accepted Answer

A) P vs.1/V 
B) V vs.T 
C) n vs.V 
D) V vs.1/T 
A) P vs.1/V 
B) V vs.T 
C) n vs.V 
D) V vs.1/T

Question 18

Some assumptions from the kinetic molecular theory are listed below.Which one is most frequently cited to explain diffusion of a gas?

Accepted Answer

A) The average kinetic energy of gas particles is proportional to the Kelvin temperature. 
B) Collisions of gas particles are elastic and total kinetic energy of the gas is constant. 
C) A gas consist of tiny particles moving in random straight line motion. 
D) The volume of the particles is negligible compared to the volume of the gas. 
A) The average kinetic energy of gas particles is proportional to the Kelvin temperature. 
B) Collisions of gas particles are elastic and total kinetic energy of the gas is constant. 
C) A gas consist of tiny particles moving in random straight line motion. 
D) The volume of the particles is negligible compared to the volume of the gas.

Question 19

A 45.0-L steel tank at 20.0°C contains acetylene gas,C2H2,at a pressure of 1.39 atm.Assuming ideal behavior,how many grams of acetylene are in the tank?

Accepted Answer

A) 2)60 g 
B) 10.0 g 
C) 67.8 g 
D) 990 g 
A) 2)60 g 
B) 10.0 g 
C) 67.8 g 
D) 990 g

Question 20

Which of the following regions of the earth's atmosphere contains the ozone layer?

Accepted Answer

A) mesosphere 
B) stratosphere 
C) thermosphere 
D) troposphere 
A) mesosphere 
B) stratosphere 
C) thermosphere 
D) troposphere

Exam 9: Gases: Their Properties and Behavior

At 298 K which is larger rate of effusion or rate of diffusion?

The pressure in a container of gas connected to an open-end mercury manometer in which the mercury level is 22 cm lower in the side open to the atmosphere and the atmospheric pressure is 734 mm Hg is ________ mm Hg.

Which of the following is not equivalent to 1 atm pressure?

If the Earth's ozone (O3)layer has a total volume of 1.00 × 1020 km3,a partial pressure of 1.6 × 10-9 atm,and an average temperature of 230 K,how many ozone molecules are in the Earth's ozone layer?

A 1.75 L container filled with CO2 gas at 25°C and 225 kPa pressure springs a leak.When the container is re-sealed,the pressure is 185 kPA and the temperature is 10°C.How many moles of gas were lost?

Carbon dioxide is a gas which causes environmental concern because of the greenhouse effect.What is the approximate percentage (by volume)of CO2 in the atmosphere?

A basketball is inflated to a pressure of 1.90 atm in a 24.0°C garage.What is the pressure of the basketball outside where the temperature is - 1.00°C?

When pressure-volume measurements are made on 1.0 mol of gas at constant temperature,a plot V versus P results in a

You are given two flasks of equal volume.One contains H2 at 0°C and 1 atm while the other contains CO2 at 0°C and 2 atm.Which of the following quantities will be the same for both flasks?

A balloon filled with helium gas at 20 °C occupies 4.91 L at 1.00 atm.The balloon is immersed in liquid nitrogen at -196°C,raising the pressure to 5.20 atm.What is the volume of the balloon in the liquid nitrogen?

Which law does the equation, = k represent?

A 1.000 kg sample of nitroglycerine,C3H5N3O9,explodes and releases gases with a temperature of 1985°C at 1.100 atm.What is the volume of gas produced? 4 C3H5N3O9(s)→ 12 CO2(g)+ 10 H2O(g)+ 6 N2(g)+ O2(g)

Which of the noble gases should show the greatest deviation from the ideal gas law at high pressures?

A 4.00-L flask contains nitrogen gas at 25°C and 1.00 atm pressure.What is the final pressure in the flask if an additional 2.00 g of N2 gas is added to the flask and the flask cooled to -55°C?

-What is the pressure (in mm Hg)of the gas inside the above apparatus if the outside pressure,Patm,is 750 mm Hg and the difference in mercury levels,Δh,is 50 mm Hg?

What is the average speed (actually the root-mean-square speed)of a neon atom at 27°C?

An approximation of absolute zero was made from an extrapolation of

Some assumptions from the kinetic molecular theory are listed below.Which one is most frequently cited to explain diffusion of a gas?

A 45.0-L steel tank at 20.0°C contains acetylene gas,C2H2,at a pressure of 1.39 atm.Assuming ideal behavior,how many grams of acetylene are in the tank?

Which of the following regions of the earth's atmosphere contains the ozone layer?

Chemistry: Matter and Measurement

Atoms, molecules, and Ions

Formulas, equations, and Moles

Reactions in Aqueous Solutions

Periodicity and the Atomic Structure of Atoms

Ionic Bonds and Some Main-Group Chemistry

Covalent Bonds and Molecular Structure

Thermochemistry: Chemical Energy

Liquids,solids,and Phase Changes

Solutions and Their Properties

Chemical Kinetics

Chemical Equilibrium

Aqueous Equilibria: Acids and Bases

Applications of Aqueous Equilibria

Thermodynamics: Entropy, free Energy, and Equilibrium

Electrochemistry

Hydrogen, oxygen, and Water

The Main-Group Elements

Transition Elements and Coordination Chemistry

Metals and Solid-State Materials

Nuclear Chemistry

Organic and Biological Chemistry

Filters

If the Earth's ozone (O₃)layer has a total volume of 1.00 × 10²⁰ km³,a partial pressure of 1.6 × 10^-9 atm,and an average temperature of 230 K,how many ozone molecules are in the Earth's ozone layer?

A 1.75 L container filled with CO₂ gas at 25°C and 225 kPa pressure springs a leak.When the container is re-sealed,the pressure is 185 kPA and the temperature is 10°C.How many moles of gas were lost?

Carbon dioxide is a gas which causes environmental concern because of the greenhouse effect.What is the approximate percentage (by volume)of CO₂ in the atmosphere?

You are given two flasks of equal volume.One contains H₂ at 0°C and 1 atm while the other contains CO₂ at 0°C and 2 atm.Which of the following quantities will be the same for both flasks?

A 1.000 kg sample of nitroglycerine,C₃H₅N₃O₉,explodes and releases gases with a temperature of 1985°C at 1.100 atm.What is the volume of gas produced? 4 C₃H₅N₃O₉(s)→ 12 CO₂(g)+ 10 H₂O(g)+ 6 N₂(g)+ O₂(g)

A 4.00-L flask contains nitrogen gas at 25°C and 1.00 atm pressure.What is the final pressure in the flask if an additional 2.00 g of N₂ gas is added to the flask and the flask cooled to -55°C?

-What is the pressure (in mm Hg)of the gas inside the above apparatus if the outside pressure,P_atm,is 750 mm Hg and the difference in mercury levels,Δh,is 50 mm Hg?

A 45.0-L steel tank at 20.0°C contains acetylene gas,C₂H₂,at a pressure of 1.39 atm.Assuming ideal behavior,how many grams of acetylene are in the tank?