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121 solutions

Chemistry Gas Laws

Q. “A 25.5 ml sample of CO2 gas at 855 torr and a temperature of 25 degrees celsius is heated at constant pressure to 375 degrees celsius. Predict the volume of the CO2 gas after this process.” The answer I got was 55.4 ml but that is apparently wrong.

Solved • Dec 15, 2019

Chemistry Gas Laws

Q. At 0.0 °C, hexane has a vapor pressure of 45.4 mmHg. Describe what is most likely to occur if the temperature is increased to 62.5 °C. a) The vapor pressure should decrease below 45.4 mmHg b) The vapor pressure should increase above 45.4 mmHg c) The vapor pressure should remain at 45.4 mmHg d) The dispersion forces will prevent the hexane from vaporizing e) The critical temperature will increase

Solved • Dec 7, 2019

Chemistry Gas Laws

Q. The following picture represents a sample of gas at a pressure of 1 atm, a volume of 1 L, and a temperature of 25 ∘C What would happen to the pressure if the volume were reduced to 0.5 L and the temperature increased to 260 ∘C?

Solved • Dec 6, 2019

Chemistry Gas Laws

Q. While resting, the average 70-kg human male consumes 14L of pure O2 per hour at 25°C and 100 kPa. How many moles of O2 are consumed by a 70-kg human male while resting for 8 hours?

Solved • Dec 5, 2019

Chemistry Gas Laws

Q. What mass of iron(II) oxide must be used in the reaction given by the equation below to release 27.9 kJ? 6FeO(s) + O2(g) => 2Fe3O4(s) ΔH° = -635 kJ Calculate your answer in g

Solved • Dec 3, 2019

Chemistry Gas Laws

Q. A sample of a gas in a piston/cyclinder apparatus occupies 49.9 mL at 1.15 atm and 23.4°C. If the volume of the sample is increased to 71.2 mL and the temperature changes to 49.8°C, what is the new pressure, in atm, of the sample?

Solved • Dec 3, 2019

Chemistry Gas Laws

Q. A scuba diver ascends too quickly and develops the bends. A nitrogen bubble has formed in the patient's elbow. At a depth of 56 ft, where the pressure is 2.70 atm, the bubble had a volume of 0.017 mL. Assuming a constant temperature and number of moles of nitrogen in the bubble, what volume did the bubble increase at the surface, where the pressure is 1.00 atm? The scuba diver is placed into a hyperbaric oxygen chamber where the pressure is 3.66 atm. What is the volume of this same nitrogen bubble while the patient is in the hyperbaric chamber?

Solved • Dec 3, 2019