Exancises Answer the following questions. Show all of your calculations in the s
ID: 561314 • Letter: E
Question
Exancises Answer the following questions. Show all of your calculations in the space provided. S. A sample of gas is placed into a sealed 0.125 LErlenmeyer flask. its pressure is found to be 1.25 atm at 298 K. How many moles are found in this sample? 6. Argon gas at O'C is placed inside a 10L container. What is the pressure of the gas if the container has 0.71 moles of gas inside of it AJ. is trying to figure out the temperature of the lab he is in, but the only thermometer in the room is broken! The only things of interest he sees is a 400 mL balloon filled with 0:02 moles of nitrogen gas left over from an earlier experiment and a 125 mL Erlenmeyer flask filled with a sodium chloride solution. Fortunately, A.J. then sees a pressure gauge in the room and is reminded of the Ideal Gas Law from his chemistry class! If AJ. measures the pressure of the balloon to be 3.9 atm, what is the temperature of the lab in "C? Assume the balloon and the lab are at the same temperature. 7.Explanation / Answer
Q5
V = 0.125 L, P = 1.25 atm, T = 298K
Apply Ideal Gas Law,
PV = nRT
where
P = absolute pressure
V = total volume of gas
n = moles of gas
T = absolute Temperature
R = ideal gas constant
n = PV/(RT) = 1.25*0.125/(0.082*298) = 0.0063942 moles
Q6
PV = nRT
P = nRT/T
P = 0.71*0.082*273/10
P = 1.589 atm
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