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A one kg non-stretch balloon fabric on the ground (Po= 1 bar) is attached to a 2 kg payload. One kg of helium is placed into the balloon. How many pounds of restraint are needed to keep the assembly tethered to the ground? When the restraints are cut how high does the assembly go in an isothermal atmosphere at -10 C? The balloon fabric can inflate to a maximum radius of five meters. At what altitude does the balloon.reach its maximum inflation? The balloon keeps rising past this height when it reaches maximum inflation and finally stops. Why does it stop? What is the pressure of the helium inside the balloon when it reaches its maximum altitude? If a little helium is released will the balloon go up or down? A 1 kg non-stretch balloon fabric on the ground (Po=1 bar) is attached to a 2 kg payload.
Hydration of alkynes (via oxymercuration) gives good yields of single compounds only with symmetrical or terminal alkynes. Draw the major organic product(s) formed
Describe the similarities and differences between gas-sensing potentiometric electrode and pH membrane potentiometric electrode
Identify the limiting reagent and the volume of CO2 formed when 11L CS2 reacts with 18L O2 to produce CO2 gas and SO2 gas at STP.
3-chloro-3,7-dimethyloctane undergoes a reaction in KOH/EtOH, H20 and produces products. Using one of the products, write the equations for the chemical reactions that will be used to establish alkene functional groups are present in your product.
Niobium (Nb) has a BCC cubic crystal structure, and an atomic radius of 0.144 nm. a) Calculate the edge length (d) of a niobium unit cell:
A 25.00 mL sample of a .1028 M monoprotic weak acid solution has a pH of 3.48 after the addition of 12.45 mL of .1106M NaOH. What is the pka of this weak acid
An element has two common isotopes. 98.89% of its atoms have an atomic mass of 12.09 amu, whereas the other 1.11% have an atomic mass of 13.10 amu. Using the isotopic composition provided, calculate the average atomic mass of the element.
Two propagation steps are given below. (a) Draw the intermediate compound in the Step 2 box. (Keep Br2.) (b) Draw the appropriate curved arrows - in the Step 1 and 2 boxes - to show the mechanism of each step. See the Hint for formatting procedure..
the flask was filledto the calibration mark with water. What were the equilibrium concentrations of H3PO4,H2PO-, HPO-2, PO-3, and H+ in the resultant solution. Ka1 = 7.1x10-3, Ka2 = 6.3x10-8, and Ka3 = 4.2x10-13 for H3PO4.
If a chemist wishes to prepare a buffer that will be effective at a pH of 5.0 and 25C, which of the following would be the best choice for the acid component and WHY
predict how the ratio of the equilibrium pressures pso2 would change when the. pso3 temperature of the uncatalyzed
Dry ice (solid ) has occasionally been used as an "explosive" in mining. A hole is drilled, dry ice and a small amount of gunpowder are placed in the hole, a fuse is added, and the hole is plugged.
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