Suppose a sample of helium gas at 45.0 °C sealed in a flask at a pressure of 5.63 atm wasfound to be contaminated by water. The gas was filtered through a cartridge containinga desiccant to remove the water and the dried gas was returned to the same flask withthe temperature brought down to 25.0 °C. What was the mole fraction of water in thecontaminated sample if the pressure of the dried gas at 25.0 °C was 5.23 atm?

Answered: Image /qna-images/answer/6fa59e53-b99c-4b2f-89e4-d1574ae68d7c.jpg

Answered: Suppose a sample of helium gas at 45.0…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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A young male adult takes in about 5.87 x 10-4 m3 of fresh air during a normal breath. Fresh air contains approximately 21% oxygen. Assuming that the pressure in the lungs is 1.09 x 105 Pa and air is an ideal gas at a temperature of 310 K, find the number of oxygen molecules in a normal breath.
The pressure unit 1 torr is comparable to 0.001 bar. In a sample of N₂ at this pressure and a temperature of 300 K, what is the mean free path between collisions in mm (millimeters)? Assume that the cross-section for N₂ molecules is o = 4.50 × 10-19 m².
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If mercury overflows, it’ll trigger an alarm in the lab. The teacher wants to keep the lab at exactly 16.37 ◦C. While the mercury alarm is in place. How long would a person of average body size (surface area of about 1.8 m2 and normal body temperature of 37◦C) have to spend in the lab which holds 2700 moles of air to trigger the mercury alarm? Side note: The maximum temperature the lab can heat the system to (to the thousandth of a degree Celsius) before the mercury overflows is 16.37◦C. Please show all work with equations that are used.
Air movement is examined in the wind tunnel test. The air enters the narrowed throat from a cross-sectional area of 0,5 m² and exits from a cross-sectional area of 0,1 m². The exit velocity of the air from the narrowed neck was measured as 25 m/s and the pressure as 150 Pa. The atmospheric pressure and the temperature measured in the facility where the wind tunnel located as 1.01 bar and 20 °C, respectively. Calculate the velocity and pressure of the air entering the narrowed throat by assuming the density of the air as constant. (R=287 J/kg.K)
What is the ΔS° for the reaction? Given are the S°, in J K-1 mol-1, of each substance in parentheses. SiCl4 (g, 330.73) + 2 Mg (s, 32.68) → 2 MgCl2 (s, 89.62) + Si (s, 18.83) -198.02 J/K 198.02 J/K -254.96 J/K 254.96 J/K
A 5.50 L sample of neon at 6.67 atm is added to a 10.0 L cylinder that contains argon. If the pressure in the cylinder is 7.63 atm after the neon is added, what was the original pressure (in atm) of argon in the cylinder? Hint is given in the feedback. Answer: 6.3315 Hint, what pressure would the neon have in the second container if no argon were present?
A 0.103-m³ tank contains 8.6×1026 molecules of N₂ at 17 MPa. Compute the (a) specific volume. Also, determine the temperature in the tank using (b) the Van der Waals equation, (c) Beattie- Bridgeman equation and (d) Benedict-Webb-Rubin equation of state. Compare each temperature you obtained with the actual value (which is 182.8 K) by computing the % error.

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