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A 1kg non-stretch balloon fabric can form a spherical balloon with a maximum radius of 5m. It is attached to a 2kg payload.The fabric is slowly inflated on the ground (?0 = 1 bar) with helium until the balloon just lifts off. Just lifts off means that the balloon is close to buoyancy equilibrium. It remains close to equilibrium as the balloon continues to rise and expand. The balloon stops rising when it reaches its full size. Assume an isothermal atmosphere at -10 degrees C and ideal gas behavior. Non-stretch fabric means the pressure inside the balloon equals the outside pressure at all times. Assume the temperature of the helium equals the outside air temperature. Take air to be (20 mol % oxygen, 80 mol % nitrogen).
a. What mass of helium was placed in balloon?
b. What altitude does the balloon reach?
When a 4.25-g sample of solid ammonium nitrate dissolves in 60.0g of water in a coffee-cup calorimeter, the temperature drops from 22.0 degree C to 16.9 degree C.
the system is not at equilibrium and will shift to the right to achieve an equilibrium state. not at equilibrium and will shift to the left to achieve an equilibrium state. at equilibrium. not at equilibrium and will remain in an unequilibrated sta..
A sample of 1.42 g of Helium and an unweighed quantity of Oxygen are mixed in a flask at room temperature. The partial pressure of Helium is 42.5 torr and of oxygen is 158 torr.
Write a balanced molecular equation for these ten combinations.
What is the pH of a solution created by mixing 200 mL of a 1.59 M NaHSO3 solution with 207 mL of a 1.11 M Na2SO3 solution
How many grams of nitrogen monoxide are produced when copper metal reacts with nitric acid to form water and 5.92 g of copper(II) nitrate in addition to the nitrogen monoxide?
Calculate the five points indicated in the experiment introduction and show these values in a small table along with one sample calculation.
Na2SO4 is dissolved in water to make 450.mL of a 0.250 M solution. How many mles of Na2SO4 are needed
If each of the following gas samples have the same temperature and pressure, which sample has the greatest volume? A) 1 gram of O2 B) 1 gram of Ar C) 1 gram of H2 D) all have the same volume E) not enough information
Potassium-40 decays to argon-40 with a half life of 1.27E^9 yr. what is the age of the sample that has a mass ratio of 40 Ar to 40K of 0.712
A large cylinder of He gas,such as that used to inflate balloons,has a volume of 25.0 L at 22 Celsius and 5.6 atm. how many moles of He are in such a cylinder ?
Calculate the enthalpy change in oxidizing this mixture in air if the reactants are at 298 K and the products are at 1200 K.
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