Macmillan Learning This is a fun problem to help realize why barometers were constructed with mercury rather than water! The density of mercury is 13.5 g/mL and the density of water is 1.00 g/mL. If a mercury barometer reads 721 mmHg, what is the barometric pressure in cmH₂O? Hint: From physics we find that the pressure is related to the height according to the equation P = dgh where d = density, g = gravitational acceleration and h is the height. Now, if we have two devices at the same pressure we can say that P = digh₁ = d₂gh₂ Use this equation, your algebra skills and your logic to see how tall a water barometer would be! barometric pressure: cmH₂0

Macmillan Learning This is a fun problem to help realize why barometers were constructed with mercury rather than water! The density of mercury is 13.5 g/mL and the density of water is 1.00 g/mL. If a mercury barometer reads 721 mmHg, what is the barometric pressure in cmH₂O? Hint: From physics we find that the pressure is related to the height according to the equation P = dgh where d = density, g = gravitational acceleration and h is the height. Now, if we have two devices at the same pressure we can say that P = digh₁ = d₂gh₂ Use this equation, your algebra skills and your logic to see how tall a water barometer would be! barometric pressure: cmH₂0

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter5: Gases

Section: Chapter Questions

Problem 151CWP: A certain flexible weather balloon contains helium gas at a volume of 855 L. Initially, the balloon...

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A certain flexible weather balloon contains helium gas at a volume of 855 L. Initially, the balloon is at sea level where the temperature is 25C and the barometric pressure is 730 torr. The balloon then rises to an altitude of 6000 ft, where the pressure is 605 torr and the temperature is 15C. What is the change in volume of the balloon as it ascends from sea level to 6000 ft?
Earths atmosphere is approximately 80 N2 and 20 O2. If the total atmospheric pressure at sea level is about 14.7 lb/in2. where lb/in2 is pounds per square inch, a common but non-SI unit of pressure, what are the partial pressures of N2 and O2 in units lbs/in2?
A chemist weighed out 5.14 g of a mixture containing unknown amounts of BaO(s) and CaO(s) and placed the sample in a 1.50-L flask containing CO2(g) at 30.0C and 750. torr. After the reaction to form BaCO3(s) and CaCO3(s) was completed, the pressure of CO2(g) remaining was 230. torr. Calculate the mass percentages of CaO(s) and BaO(s) in the mixture.
A 1.26-g sample of a gas occupies a volume of 544 mL at 27 C and 744 torr? What is the molecular formula and name of the gas if its empirical formula is C2H5.
A sample of natural gas is 85.2% methane, CH4, and 14.8% ethane, C2H6, by mass. What is the density of this mixture at 18C and 771 mmHg?
47 HCl(g) reacts with ammonia gas, NH3(g), to form solid ammonium chloride. If a sample of ammonia occupying 250 mL at 21 C and a pressure of 140 torr is allowed to react with excess HCl, what mass of NH4Cl will form?
A collapsed balloon is filled with He to a volume of 12.5 L at a pressure of 1.00 atm. Oxygen, O2, is then added so that the final volume of the balloon is 26 L with a total pressure of 1.00 atm. The temperature, which remains constant throughout, is 21.5 C. (a) What mass of He does the balloon contain? (b) What is the final partial pressure of He in the balloon? (c) What is the partial pressure of O2 in the balloon? (d) What is the mole fraction of each gas?