Question

a syringe is filled with 40. mL. of air at room temperature (22°C) in the lab and then this syringe is placed into a boiling water bath. After S minutes, the volume of gas in in the syringe (still at lab pressure) should be close to which volume? 9. Which of these is a true statement about a below a tube that is filled with a liquid such as mercury b. The weight of the liquid (usually mercury) pulls the air down the tube a. 8.8 mL b. 32 mL c. 50 mL d. 182 mL c. A barometer typically is used to measure both temperature and atmospheric pressure d.A barometer placed in the mountains would have a column of mercury shorter than if it were placed at the Spotsylvania High School 13. If the temperature of a gas were lowered, what would be true about the average velocity and 10. Which of these statements about KMT (kinetic range of velocities of the molecules? molecular theory) is NOT correct? a. Average increases; Range decreases b. Average decreases; Range decreases c. Average increases; Range increases d. Average decreases; Range increases a. Gas particles are in continuous motion, travelling in straight lines, changing directions only when they collide with other molecules or a container wall. b. Gas particles are so small, they occupy a negligible amount of space compared to the distance between them. 14. A compressed gas solution contains 45% Argon, 40% oxygen and 15% nitrogen. The pressure in the container is 15 atm, which of these is the partial pressure exerted by oxygen? The pressure exerted by a gas in a c. container results from collisions between the gas particles and the container walls. Gas particles are symblastic, exerting no attractive or repulsive forces on each other a. 267 torr b. 289 torr c. 2052 torr d. 4560 torr d. or the container walls. 15. In the ideal gas law, which of these statements I1. A gas has a volume of 2.45 L at a pressure of are NOT true? 8.84 atm. If the temperature is held constant, at what pressure would there be 10.0 L of the gas? a. The R value you select should match the b. Temperature is in Kelvin, which is c. To convert pressure in torr units into pressure unit being used. a. 0.471 atm b. 2.17 atm c. 2.77 atm d. 36.2 atm equal to °C+273 atmosphere units, multiply the torr units by 760 Volume can be in Liters d.

9,10,11,12,13,14, and 15 please

Answer 1

9. (d) As the pressure at the top of the mountain will be less than at the plain area so the barometer reading at school be larger .

10. (a) The particles are in continuous motion but in all possible direction and not in one direction,

11.(b) If the gas follows ideal gas law then according to it P1V1=P2V2 for constant temperature, this implies P2 = P1 * V1 /V2 = 8.84*2.45/10 = 2.17 atm.

12 . Same if the follows ideal gas law then at constant pressure V1*T2=V2*T1, this implies V2 = V1*T2 /T1 = 40*(22+273.15)/ 373.15 = 32 ml (b)

13 .(B) As according to maxwell's diagram when the temperature is lowered the peak increases its height and the peak position shifts backward.

14. According the Dalton's law of partial pressure. Partial pressure of oxygen in the mixture = 40% of 15 atm = 6 atm= 6*760=4560 torr (d)

15.(c) As 760 torr = 1 atm.