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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?
The white solid that remains in the centrifuge tube after acetone extraction fizzes when hydrochloric acid is added, suggesting that sodium carbonate is present. How did this substance form? Give a balanced equation for its formation.
5.00 ml of water sample was titrated for hardness with 4.15ml of 0.0200m edta. write the equation for the reaction and
The brominated product of acetanilide is disubstituted aromatic ring( 2 groups on the benzoering)draw any constitutional isomer that has a monosubtituted aromatic ring and the compound should not have any formal charge
a sample of nitrogen gas occupies 1.55 L at 27.0 C and 1.00 atm pressure. What will the volume be -100 C and the same pressure?
The equilibiurm constant Kc for the reaction below is 4,2 at 1650 degrees Celcius. H2(g)+CO2(g)---->H2O(g)+CO(g). Initially 0.80 mol H2 and 0.08 mol CO2 are injected into a 5.0-L flask
The endpoint in the titration is "overshot" A. is the reported molar concentration of the hydrochloric acid solution too high or too low. EXPLAIN
a 1L flask contained 2g N2, 0.4g H2 and 9g O2 at 27c. what is the total pressure in the flask?
a 50 ml solution containing NaBr was treated with excess AgNo3 to precipitate 0.2146g of AgBr. what is the molarity of NaBr in the solution.
How many grams of CH4 is needed to produce 33.5 g CHCl3.
how many kilojoules of heat are absorbed when 7.20g of mgos is decomposed into mgs and o2 g at constant
Calculate the final temperature of 204 mL of water initially at 35 degrees C upon absorption of 18kJ of heat.
A sample of vapor occupies a volume of 125 mL at 100 degrees C and 748 torr. What is the volume of the same sample under STP conditions?
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