Mukiple Choice (30 points) hich of the following statements is TRUE for gases? T

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Mukiple Choice (30 points) hich of the following statements is TRUE for gases? The volume of a gas is directly proportional to the pressure in torr The temperature of a gas is inversely proportional to its pressure. ii. The pressure of a gas is due to collisions of the gas molecules d i and i onlye i and ii on 2. Which of the following is not a postulate of the kinetic-molecular theory of gases? a. Gas molecules will eventually stop colliding due to the energy lost in each collision. b. All gases consist of atoms and molecules moving randomly in all directions at various speeds c. The average kinetic energy of gas molecules increases as the temperature increases d.e olume of a gas molecule is negligible when compared to the space that separates it from other gas There are no attractive or repulsive forces between gas molecules e. 3. Which of the following is NOT true at STP conditions? a. Temperature is at 0°C and pressure is at 1 atm b. The volume of I mol of Cl: gas is 12L c. The volume of 1 mol of He gas is 22.4L d. Temperature is at 273 K and pressure is at 760 mmHg All the above are true e. 4. A heating curve illustrates a. What a substance looks like as it is heated b. What happens to the particles of a substance as it is heated c. What happens to the heat applied as the temperature is increased d. The chemical changes that occur as the substance is heated. e. The changes in the temperature and physical state of a substance as it is heated 5. A hydrogen bond is a. The polar O-H bond in water b. A covalent bond between H and O. c. An icnic bond berween H and another atom. d. A bond that is stronger than a covalent bond An attraction between a hydrogen atom attached to N, O, or F and an N, O, or F atom 6. The coocept of "ike disoves lkeisillustrated by which of the following? Cuso4o is more soluble in CCl, than in water. b CCla is soluble in water. NaCT (s) is more soluble in CCle than in water.d Its) is more soluble in CCl than in water 7. A student dilutes 50.0 ml of a 0.10 mol/L solution of HCl to 0.010 mol/L by adding water. Which statement is true? A. The volume of the solution remains the same. c. The volume of the solvent remains the same. d. The total amount of solute decreases b. The total amount of solute remains the same. e. None list are correct

Explanation / Answer

please ask questions separtely and not all together

1 c iii only.( becuase P is directly proportional to T and inversely proportional to V which makes the other statements wrong

2 a gases will eventually stop colliding due to energy lost during each collision

3 b is not true. volume of 1 mole gas at STP is 22.4 L

4e the changes in temperature and the physical state of a substance as it is heated

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