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Chapter 8: Gases Quiz 1. Which of these properties is/are characteristic(s) of gases? A) High compressibility B) Relatively large distances between molecules C) Formation of homogeneous mixtures regardless of the nature of gases D) A and B E) A, B, and C. 2. The pressure of a gas sample was measured to be 654 mmHg. What is the pressure in kPa? 1 atm 1.01325 x 10s Pa) A) 87.2 kPa B) 118 kPa C) 6.63 x 104 kPa D) 8.72 Ã 104 kPa E) 8.72 x 107 kPa 3. The temperature of an ideal gas in a 5.00 L container originally at 1 atm pressure and 25Â°C is lowered to 220 K. Calculate the new pressure of the gas. A) 1.0 atm B 1.35 atm C) 8.8 atmD) 0.738 atm E) 0.114 atm 4. 0.820 mole of hydrogen gas has a volume of 2.00 L at a certain temperature and pressure. What is the volume of 0.125 mol of this gas at the same temperature and pressure? A) 0.0512 L B) 0.250L C) 0.305 L D) 4.01L E 19.5 L 5. Calculate the volume occupied by 25.2 g of COz at 0.84 atm and 25Â°C. R-0.08206 L-atm/K-mol. A)0.060 L B)1.34 L C) 16.9 L D) 24.2 L E) 734 L 6. A gas evolved during the fermentation of sugar was collected. After purification its volume was found to be 25.0 L at 22.5Â°C and 702 mmHg. How collected? many moles of gas were A) 0.95 m B 1.05 mol C) 12.5 mol D) 22.4 mo E) 724 mol 7. Calculate the mass, in grams, of 2.74 L of CO gas measured at 33Â°C and 945 mmHg A) 0.263 g B) 2.46g C) 3.80 g D) 35.2 g E) 206 g The molecules of different samples of an ideal gas have the same average kinetic 8. energies, at the same A) pressure. B) temperature. C volume D density Which gas has molecules with the greatest average molecular speed at 25Â°C? A) CH4 9. B) Kr C) N2 D) CO2 E) Ar Show transcribed image text

Chapter 8: Gases Quiz 1. Which of these properties is/are characteristic(s) of gases? A) High compressibility B) Relatively large distances between molecules C) Formation of homogeneous mixtures regardless of the nature of gases D) A and B E) A, B, and C. 2. The pressure of a gas sample was measured to be 654 mmHg. What is the pressure in kPa? 1 atm 1.01325 x 10s Pa) A) 87.2 kPa B) 118 kPa C) 6.63 x 104 kPa D) 8.72 Ã 104 kPa E) 8.72 x 107 kPa 3. The temperature of an ideal gas in a 5.00 L container originally at 1 atm pressure and 25Â°C is lowered to 220 K. Calculate the new pressure of the gas. A) 1.0 atm B 1.35 atm C) 8.8 atmD) 0.738 atm E) 0.114 atm 4. 0.820 mole of hydrogen gas has a volume of 2.00 L at a certain temperature and pressure. What is the volume of 0.125 mol of this gas at the same temperature and pressure? A) 0.0512 L B) 0.250L C) 0.305 L D) 4.01L E 19.5 L 5. Calculate the volume occupied by 25.2 g of COz at 0.84 atm and 25Â°C. R-0.08206 L-atm/K-mol. A)0.060 L B)1.34 L C) 16.9 L D) 24.2 L E) 734 L 6. A gas evolved during the fermentation of sugar was collected. After purification its volume was found to be 25.0 L at 22.5Â°C and 702 mmHg. How collected? many moles of gas were A) 0.95 m B 1.05 mol C) 12.5 mol D) 22.4 mo E) 724 mol 7. Calculate the mass, in grams, of 2.74 L of CO gas measured at 33Â°C and 945 mmHg A) 0.263 g B) 2.46g C) 3.80 g D) 35.2 g E) 206 g The molecules of different samples of an ideal gas have the same average kinetic 8. energies, at the same A) pressure. B) temperature. C volume D density Which gas has molecules with the greatest average molecular speed at 25Â°C? A) CH4 9. B) Kr C) N2 D) CO2 E) Ar

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30 Jun 2019