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To being your experiment you will calibrate your apparatus by injecting air into a sealed reaction bottle. Suppose you inject 20.0 mL of air (initially at a temperature of 23.1 (degrees Celsius) and a pressure of .954 atm) into a bottle at the same temperature and pressure. After the injection, the pressure is observed to be 1.023 atm (with no change in temperature). How many moles of gas caused this pressure change 1.023-.954 atm=.069 atm? This mole-to pressure change equivalence will be used asa conversion factor in questions 2 and 3.
Calculate the pH of a solution prepared by adding 20.0 mL of 0.100 M HCl to 80.0 mL of a buffer that is comprised of 0.25 M C2H5NH2 and 0.25 M C2H5NH3Cl. Kb of C2H5NH2 = 9.5 x 10-4
What is true about ideal gas particles? a. Particles interact via the Lennard-Jones potential b. Particle volume is approximated as a sphere with diameter b
how many grams of chlorine are required to react completely with 5.00grams of sodium to produce sodium chlorde ?
Explain why and calculate the difference between the delta S° values at 298 K for the complete dissociation of the two complex ions. (Hint: the value delta H is about the same for both systems.)
What is the volume of 25.0 g of methylene chloride and what is the mass of 398.0 mmol of benzene (C6H6)
The gas above the top liquid is at an absolute pressure of Pg. Furthermore, the densities and heights of liquid 1 and liquid 2 are P1 and P2 , and L1 and L2 , respectively. In terms of these given symbols, waht is the absolute pressure at the bott..
How many minutes will it take to plate out 16.22 g of Al Metal from a solution of Al^+3 using a current of 12.9 amps in an electrolytic cell
buffer solution that has [H2PO4-]=[HPO4-2]=0.132 M. What is the pH of the solution before adding NaOH? After adding NaOH?
A 1.00 L flask at 298 K contains a mixture of Kr and N2 with a total pressure of 0.940 atm. If the mole fraction of Kr is 0.455, what is the mass fraction of Kr
according to the law of conservation of mass if the products of a reaction have a mass of 64.0 grams then the total
A mixture of three gases, A, B, and C, is at a total pressure of 9.38 atm. The partial pressure of gas A is 1.88 atm and that of gas B is 2.32 atm. What is the partial pressure of gas C?
a gas confined in a 519.1-ml container exerts a pressure of 107 mm hg at 38.6 degrees celsius. at what celsius
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