كويز تفاعلي: 124 Questions: Revision / Chemistry / 10Adv / T3

Question 1

DB question no.: 1

Points: 1

According to the kinetic-molecular theory, gases condense into liquids due to...
تبعاً لنظرية الحركة الجزيئية، الغازات تتكثف إلى سوائل بسبب...

Question 2

DB question no.: 2

Points: 1

Diffusion between two gases occurs faster if the gases are at...
الانتشار بين غازين يحدث أسرع إذا كانت الغازات عند...

Question 3

DB question no.: 3

Points: 1

Which of the following represent "a gas escapes through a tiny opening"?
ماذا يعني "مرور الغاز عبر ثقب ضيق"؟

Question 4

DB question no.: 4

Points: 1

Which of the following states that "the rate of effusion for a gas is inversely proportional to the square root of its molar mass"?
أي القوانين ينص على أن "معدل تدفق الغاز يتناسب عكسياً مع الجذر التربيبي لكتلته المولية"؟

Question 5

DB question no.: 5

Points: 1

Calculate the ratio of diffusion rates for carbon monoxide and carbon dioxide. (molar mass: CO = 28, CO₂ = 44)

Question 6

DB question no.: 6

Points: 1

Which of the following is correct about pressure units?
أي مما يأتي صحيح فيما يتعلق بوحدات قياس الضغط؟

Question 7

DB question no.: 7

Points: 1

A mixture of oxygen (O₂), carbon dioxide (CO₂), and nitrogen (N₂) has a total pressure of 0.97 atm. What is the partial pressure of O₂ if the partial pressure of CO₂ is 0.70 atm and the partial pressure of N₂ is 0.12 atm?

Question 8

DB question no.: 8

Points: 1

The partial pressure of the gas depends on:
الضغط الجزئي للغاز يعتمد على:

Question 9

DB question no.: 9

Points: 1

The pressure of a sample of helium in a 1.00 -L container is 0.988 atm. What is the new pressure if the sample is placed in a 2.00 -L container?

Question 10

DB question no.: 10

Points: 1

A helium balloon in a closed car occupies a volume of 2.32 L at $40.0^\circ \text{C}$. If the car is parked on a hot day and the temperature inside rises to $75.0^\circ \text{C}$, what is the new volume of the balloon, assuming the pressure remains constant?

Question 11

DB question no.: 11

Points: 1

The pressure of the oxygen gas inside a canister is 5.00 atm at $25.0^\circ \text{C}$. If the temperature falls to $-10.0^\circ \text{C}$, what is the new pressure inside the canister?

Question 12

DB question no.: 12

Points: 1

A gas at 110 kPa and $30.0^\circ \text{C}$ fills a flexible container with an initial volume of 2.00 L. If the temperature is raised to $80.0^\circ \text{C}$ and the pressure increases to 440 kPa, what is the new volume?

Question 13

DB question no.: 13

Points: 1

According to Avogadro principle, 1 mol of any gas at STP occupies a volume of...

Question 14

DB question no.: 14

Points: 1

Determine the Celsius temperature of 2.49 mol of a gas contained in a 1.00 -L vessel at a pressure of 143 kPa.

Question 15

DB question no.: 15

Points: 1

Real gases deviate most from ideal gas behavior at:

Question 16

DB question no.: 16

Points: 1

Which of the following is a suspension?
أي مما يلي يُعتبر من المعلقات؟

Question 17

DB question no.: 17

Points: 1

What is the percent by mass of NaHCO₃ in a solution containing 20.0 g of NaHCO₃ dissolved in 600.0 g of H₂O?

Question 18

DB question no.: 18

Points: 1

What is the molarity of an aqueous solution containing 40.0 g of glucose (C₆H₁₂O₆) in 1.5 L of solution? (molar mass = 180 g/mol)

Question 19

DB question no.: 19

Points: 1

What is the molality of a solution containing 10.0 g of NaOH dissolved in 1000.0 g of water? (molar mass of NaOH = 40 g/mol)

Question 20

DB question no.: 20

Points: 1

If 0.85 g of a gas at 4.0 atm of pressure dissolves in 1.0 L of water, how much will dissolve in 1.0 L of water at 1.0 atm of pressure and the same temperature?

Question 21

DB question no.: 21

Points: 1

The kinetic-molecular theory explains the behavior of...
نظرية الحركة الجزيئية تصف سلوك...

Question 22

DB question no.: 22

Points: 1

According to molecular motion theory, particles of matter are in motion in...
تبعاً لنظرية الحركة الجزيئية، جسيمات المادة تكون في حالة حركة في...

Question 23

DB question no.: 23

Points: 1

If two iron balls collide and their total kinetic energy remains the same before and after the collision, this is an example of...

Question 24

DB question no.: 24

Points: 1

Which of the following is correct about gases?

Question 25

DB question no.: 25

Points: 1

What definitely explains the lower density of gases compared with liquids?

Question 26

DB question no.: 26

Points: 1

In the figure, the yellow arrow represents...

Question 27

DB question no.: 27

Points: 1

In the figure, the green arrows represent...

Question 28

DB question no.: 28

Points: 1

The random motion of gas particles causes gases to mix until they are evenly distributed. This process is called...

Question 29

DB question no.: 29

Points: 1

In the kinetic-molecular theory, which term is a measure of the average kinetic energy of the particles in a sample of matter?

Question 30

DB question no.: 30

Points: 1

According to the figure, what happens during compression of a gas?

Question 31

DB question no.: 31

Points: 1

According to the figure, what happens during expansion of a gas?

Question 32

DB question no.: 32

Points: 1

Which is NOT an assumption of the kinetic-molecular theory?

Question 33

DB question no.: 33

Points: 1

Which of the following statements is true?

Question 34

DB question no.: 34

Points: 1

Which of the following is NOT an assumption of the kinetic-molecular theory of gases?

Question 35

DB question no.: 35

Points: 1

Ammonia (NH3) has a molar mass of 17.0 g/mol and hydrogen chloride (HCl) has a molar mass of 36.5 g/mol. What is the ratio of their diffusion rates?

Question 36

DB question no.: 36

Points: 1

Calculate the ratio of effusion rates for nitrogen (N2) and neon (Ne). Molar masses: N2 = 28, Ne = 20.2.

Question 37

DB question no.: 37

Points: 1

What is the rate of effusion for a gas that has a molar mass twice that of a gas that effuses at a rate of 3.6 mol/min?

Question 38

DB question no.: 38

Points: 1

At a certain temperature, hydrogen molecules move at 1.84 x 10³ m/s. Calculate the molar mass of gas X if its molecules move at 312 m/s. Molar mass of H2 = 2 g/mol.

Question 39

DB question no.: 39

Points: 1

What is the ratio of diffusion rates for sulfur trioxide (SO3) and sulfur dioxide (SO2)? Molar masses: SO3 = 80 g/mol, SO2 = 64 g/mol.

Question 40

DB question no.: 40

Points: 1

What is the ratio of diffusion rate for nitrogen (N2) and sulfur trioxide (SO3)? Molar masses: N2 = 28 g/mol, SO3 = 80 g/mol.

Question 41

DB question no.: 41

Points: 1

The weather report gives atmospheric pressure as 0.95 atm. Express this pressure in mmHg.

Question 42

DB question no.: 42

Points: 1

The weather report gives atmospheric pressure as 0.95 atm. Express this pressure in kPa.

Question 43

DB question no.: 43

Points: 1

The weather report gives atmospheric pressure as 0.95 atm. Express this pressure in torr.

Question 44

DB question no.: 44

Points: 1

The weather report gives atmospheric pressure as 96.2 kPa. Express this pressure in atm.

Question 45

DB question no.: 45

Points: 1

Which of the following is correct about pressure units?

Question 46

DB question no.: 46

Points: 1

What is the partial pressure of hydrogen gas in a mixture of hydrogen and helium if the total pressure is 600 mmHg and the partial pressure of helium is 439 mmHg?

Question 47

DB question no.: 47

Points: 1

Find the total pressure for a mixture that contains four gases with partial pressures of 5.00 kPa, 4.56 kPa, 3.02 kPa, and 1.20 kPa.

Question 48

DB question no.: 48

Points: 1

Find the partial pressure of carbon dioxide in a gas mixture with a total pressure of 30.4 kPa if the partial pressures of the other two gases are 16.5 kPa and 3.7 kPa.

Question 49

DB question no.: 49

Points: 1

Air is roughly 78% nitrogen, 21% oxygen, and 1% argon. If atmospheric pressure is 760 mmHg, what is the partial pressure of nitrogen?

Question 50

DB question no.: 50

Points: 1

What is the partial pressure of water vapor in an air sample when total pressure is 1.00 atm, partial pressure of nitrogen is 0.79 atm, partial pressure of oxygen is 0.20 atm, and the partial pressure of all other gases is 0.0044 atm?

Question 51

DB question no.: 51

Points: 1

What is the partial pressure of oxygen in an air sample when total pressure is 1.10 atm, partial pressure of nitrogen is 0.75 atm, partial pressure of water vapor is 0.0056 atm, and the partial pressure of all other gases is 0.0044 atm?

Question 52

DB question no.: 52

Points: 1

Which of the following does not affect the partial pressure of a gas?

Question 53

DB question no.: 53

Points: 1

The volume of a gas at 99.0 kPa is 300.0 mL. If the pressure is increased to 188 kPa, what will be the new volume?

Question 54

DB question no.: 54

Points: 1

A diver blows a 0.75-L air bubble 10 m under water. As it rises to the surface, the pressure goes from 2.25 atm to 1.03 atm. What will be the volume of air in the bubble at the surface?

Question 55

DB question no.: 55

Points: 1

Air trapped in a cylinder fitted with a piston occupies 145.7 mL at 1.08 atm. What is the new volume when the piston is depressed, increasing the pressure by 25%?

Question 56

DB question no.: 56

Points: 1

Air trapped in a cylinder fitted with a piston occupies 365.5 mL at 0.985 atm. What is the new volume when the piston is depressed, increasing the pressure by 50%?

Question 57

DB question no.: 57

Points: 1

As the external pressure on a cylinder piston increases from 1.0 atm to 4.0 atm, the gas volume changes from 10 L to 2.5 L. What is the new pressure on the cylinder piston?

Question 58

DB question no.: 58

Points: 1

What volume will the gas in the balloon occupy at 250 K if its initial volume is 4.3 L at 350 K?

Question 59

DB question no.: 59

Points: 1

A gas at 89°C occupies a volume of 0.67 L. At what Celsius temperature will the volume increase to 1.12 L?

Question 60

DB question no.: 60

Points: 1

The Celsius temperature of a 3.00-L sample of gas is lowered from 80.0°C to 30.0°C. What will be the resulting volume of this gas?

Question 61

DB question no.: 61

Points: 1

A gas occupies 0.67 L at 350 K. What temperature is required to reduce the volume by 45%?

Question 62

DB question no.: 62

Points: 1

A sample of gas occupies 6.50 L at 95.0°C. What is the Celsius temperature when the volume becomes 1.63 L?

Question 63

DB question no.: 63

Points: 1

A gas occupies a volume of 0.85 L at 375 K. What temperature is required to reduce the volume to 60% of the original volume?

Question 64

DB question no.: 64

Points: 1

The pressure in an automobile tire is 1.88 atm at 25.0°C. What will be the pressure if the temperature increases to 37.0°C?

Question 65

DB question no.: 65

Points: 1

Helium gas in a cylinder has a pressure of 1.12 atm. At 36.5°C, the same gas sample has a pressure of 2.56 atm. What was the initial temperature of the gas?

Question 66

DB question no.: 66

Points: 1

If a gas sample has a pressure of 30.7 kPa at 0.00°C, by how many degrees Celsius must the temperature increase to cause the pressure to double?

Question 67

DB question no.: 67

Points: 1

A sample of air in a syringe exerts a pressure of 1.02 atm at 22.0°C. The syringe is placed in a boiling-water bath at 100.0°C. The pressure is increased to 1.23 atm, which reduces the volume to 0.224 L. What was the initial volume?

Question 68

DB question no.: 68

Points: 1

If the temperature in the gas cylinder increases to 30.0°C and the pressure increases to 1.20 atm, will the piston move up or down?

Question 69

DB question no.: 69

Points: 1

A sample of nitrogen gas is transferred to a larger flask. Given V1 = 500 mL, P1 = 108 kPa, T1 = 10.0°C, V2 = 750 mL, and T2 = 21.0°C, what is the pressure of nitrogen in the second flask?

Question 70

DB question no.: 70

Points: 1

The following curve represents the relationship between volume and number of moles. Which principle does it show?

Question 71

DB question no.: 71

Points: 1

Equal volumes of gases at the same pressure and temperature contain equal numbers of particles. This is the statement of...

Question 72

DB question no.: 72

Points: 1

Which graph represents Avogadro’s principle?

Question 73

DB question no.: 73

Points: 1

What size container is needed to hold 0.0459 mol of N2 gas at STP?

Question 74

DB question no.: 74

Points: 1

How much carbon dioxide gas, in grams, is in a 1.0-L balloon at STP? Molar mass of CO2 = 44 g/mol.

Question 75

DB question no.: 75

Points: 1

What volume in milliliters will 0.00922 g of H2 gas occupy at STP? Molar mass of H2 = 2 g/mol.

Question 76

DB question no.: 76

Points: 1

What volume will 0.416 g of krypton gas occupy at STP? Molar mass of Kr = 83.8 g/mol.

Question 77

DB question no.: 77

Points: 1

Calculate the volume that 4.5 kg of ethylene gas (C2H4) will occupy at STP. Molar mass of C2H4 = 28 g/mol.

Question 78

DB question no.: 78

Points: 1

Calculate the volume of a 0.323-mol sample of a gas at 265 K and 0.900 atm.

Question 79

DB question no.: 79

Points: 1

What is the pressure, in atmospheres, of a 0.108-mol sample of helium gas at 20.0°C if its volume is 0.505 L?

Question 80

DB question no.: 80

Points: 1

If the pressure exerted by a gas at 25°C in a volume of 0.044 L is 3.81 atm, how many moles of gas are present?

Question 81

DB question no.: 81

Points: 1

An ideal gas has a volume of 3.0 L. If the number of moles of gas and the temperature are doubled while pressure remains constant, what is the new volume?

Question 82

DB question no.: 82

Points: 1

If the pressure exerted by a gas at 35°C in a volume of 0.044 L is 7.62 atm, how many moles of gas are present?

Question 83

DB question no.: 83

Points: 1

How much carbon dioxide gas, in grams, is in a 2.75-L balloon at STP? Molar mass of CO2 = 44.0 g/mol.

Question 84

DB question no.: 84

Points: 1

A 2.00-L flask is filled with propane gas (C3H8) at 1.00 atm and -15.0°C. What is the mass of propane in the flask? Molar mass of C3H8 = 44 g/mol.

Question 85

DB question no.: 85

Points: 1

A 2.00-L flask is filled with ethane gas (C2H6). What is the mass of ethane in the flask? Molar mass of C2H6 = 30 g/mol.

Question 86

DB question no.: 86

Points: 1

What is the density of a sample of nitrogen gas (N2) that exerts a pressure of 5.30 atm in a 3.50-L container at 125°C? Molar mass of N2 = 28 g/mol.

Question 87

DB question no.: 87

Points: 1

Geraniol is a compound found in rose oil. What is the molar mass of geraniol if its vapor has a density of 0.480 g/L at 260.0°C and 0.140 atm?

Question 88

DB question no.: 88

Points: 1

A 4.50-L flask is filled with butane gas (C4H10) at 1.20 atm and -10.0°C. What is the density of butane? Molar mass of butane = 58 g/mol.

Question 89

DB question no.: 89

Points: 1

Which of the following is a characteristic of an ideal gas?

Question 90

DB question no.: 90

Points: 1

When does a real gas behave like an ideal gas?

Question 91

DB question no.: 91

Points: 1

Which of the following is true about colloid particles?

Question 92

DB question no.: 92

Points: 1

Two liquids that can be mixed together but separate shortly after are said to be...

Question 93

DB question no.: 93

Points: 1

Why do colloidal particles settle out in a mixture if it is heated?

Question 94

DB question no.: 94

Points: 1

The corresponding figure shows the passage of light in two mixtures. What are A and B?

Question 95

DB question no.: 95

Points: 1

What is the solvent of air?

Question 96

DB question no.: 96

Points: 1

Which type of solution is represented by carbonated water?

Question 97

DB question no.: 97

Points: 1

You have 1500.0 g of a bleach solution. The percent by mass of sodium hypochlorite (NaOCl) is 3.62%. How many grams of NaOCl are in the solution?

Question 98

DB question no.: 98

Points: 1

The percent by mass of calcium chloride in a solution is 2.65%. If 50.0 g of calcium chloride is used, what is the mass of the solution?

Question 99

DB question no.: 99

Points: 1

What is the percent by mass of sodium chloride (NaCl) in a solution containing 4.0 g of NaCl dissolved in 100.0 g of water?

Question 100

DB question no.: 100

Points: 1

Calculate the molarity of 1.60 L of a solution containing 1.55 g of dissolved KBr. Molar mass of KBr = 119 g/mol.

Question 101

DB question no.: 101

Points: 1

How many grams of calcium hydroxide Ca(OH)2 are needed to produce 1.5 L of a 0.25 M solution? Molar mass of Ca(OH)2 = 74 g/mol.

Question 102

DB question no.: 102

Points: 1

How much Ba(OH)2, in grams, is needed to make a 1.00 m aqueous solution? Molar mass of Ba(OH)2 = 171.3 g/mol.

Question 103

DB question no.: 103

Points: 1

What is the molality of a solution containing 5.0 g of sodium chloride (NaCl) dissolved in 100.0 g of water? Molar mass of NaCl = 58.44 g/mol.

Question 104

DB question no.: 104

Points: 1

What is the mole fraction of NaOH in an aqueous solution that contains 22.8% NaOH by mass? Molar masses: NaOH = 40 g/mol, H2O = 18 g/mol.

Question 105

DB question no.: 105

Points: 1

What is the mole fraction of hydrochloric acid (HCl) in a solution containing 22% HCl and 78% H2O by mass? Molar masses: HCl = 36.5 g/mol, H2O = 18 g/mol.

Question 106

DB question no.: 106

Points: 1

What is the mole fraction of hydrochloric acid (HCl) if the figure shows a solution containing 22% HCl and 78% H2O?

Question 107

DB question no.: 107

Points: 1

If 0.55 g of a gas dissolves in 1.0 L of water at 20.0 kPa of pressure, how much will dissolve at 110.0 kPa of pressure?

Question 108

DB question no.: 108

Points: 1

A gas has a solubility of 0.66 g/L at 10.0 atm. What is the pressure on a 1.0-L sample that contains 1.5 g of gas?

Question 109

DB question no.: 109

Points: 1

The solubility of a gas at 7 atm is 0.52 g/L. How many grams of the gas would dissolve per 1 L if the pressure is raised to 10 atm?

Question 110

DB question no.: 110

Points: 1

Using the solubility graph, which statement is NOT correct?

Question 111

DB question no.: 111

Points: 1

From the graph, determine the solubility of KClO3 at 75°C.

Question 112

DB question no.: 112

Points: 1

From the graph, determine the solubility of KCl at 40°C.

Question 113

DB question no.: 113

Points: 1

From the graph, determine the solubility of KClO3 at 90°C.

Question 114

DB question no.: 114

Points: 1

From the graph, determine the solubility of NaCl at 90°C.

Question 115

DB question no.: 115

Points: 1

Which factors generally increase the rate at which a solid dissolves in a liquid? i. increasing pressure of solution; ii. shaking or stirring; iii. increasing surface area of solute; iv. increasing temperature of solvent.

Question 116

DB question no.: 116

Points: 1

Which of the following is slowest to dissolve when using the same amount of tea and sugar?

Question 117

DB question no.: 117

Points: 1

Regarding the effect of temperature on the rate of solvation, which statement is incorrect? 1) Most solid substances dissolve faster in hot solvents than in cold solvents. 2) The amount of solute increases in hot solvent than in cold solvent. 3) The solubility of gases increases by increasing temperature.

Question 118

DB question no.: 118

Points: 1

Regarding the effect of temperature on the rate of solvation, which statements are correct? 1) Most solids dissolve more slowly in hot solvents than in cold solvents. 2) The amount of solute increases in hot solvent than in cold solvent. 3) The solubility of gases decreases by increasing temperature.

Question 119

DB question no.: 119

Points: 1

Regarding the effect of temperature on the rate of solvation, which statements are correct? 1) Most solids dissolve faster in hot solvents than in cold solvents. 2) The amount of solute decreases in hot solvent than in cold solvent. 3) The solubility of gases increases by increasing temperature.

Question 120

DB question no.: 120

Points: 1

Which statement is correct regarding the relationship between temperature and solubility of a gas?

Question 121

DB question no.: 121

Points: 1

The effect of intermolecular forces in solvation is...

Question 122

DB question no.: 122

Points: 1

In the solvation process of salt shown in the figure, what happens to the salt?

Question 123

DB question no.: 123

Points: 1

In the solvation process of salt shown in the figure, what is step 2?

Question 124

DB question no.: 124

Points: 1

In the solvation process of salt shown in the figure, what is step 3?

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كويز تفاعلي: 124 Questions: Revision / Chemistry / 10Adv / T3

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