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Imagine that you have a 6.50 L gas tank and a 4.00 L gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the larger tank with oxygen to a pressure of 115 atm, to what pressure should you fill the acetylene tank to ensure that you run out of each gas at the same time? Assume ideal behavior for all gases.
What is the pH of the resulting solution if 30.00 mL of 0.10 M acetic acid is added to 10.00 mL of 0.10 M NaOH. Assume that the volumes of the solutions are additive. Ka = 1.8 x 10-5 for CH3CO2H.
a 27.0-gram sample of an unknown hydrocarbon was burned in excess oxygen to form 88.0 grams of carbon dioxide and 27.0
What is the molecular mass of a gas that diffuses through a porous membrane 1.26 times faster than Kr
how much heat does your body lose when 2.5 grams of sweat evaporates from your skin at the temperature of 298k? assume
To determine the molecular formula of a compound - gas was mixed with calcium chloride solution,
Calculate the volume of carbon dioxide formed at a pressure of 2.50 atm and a temperature of 1250C.
Assume the radius of a neutron to be approximately 1.0; times ;10^{ - 13} {rm cm}, and calculate the density of a neutron. [Hint: For a sphere V = (4/3)pi r^3.]
At 7914 oC the equilibrium constant for the reaction: 2 NO(g) N2(g) + O2(g) is KP = 0.726. If the initial pressure of NO is 0.00366 atm, what are the equilibrium partial pressures of NO, N2, and O2? p(NO) = . p(N2) = . p(O2) = .
naturally occurring isotopes, Re-185 (mass = 184.935 amu) and Re-187 (mass = 186.956 amu). Calculate the percent abundances of the isotopes of rhenium.
A certain reaction has an enthalpy of change in H = 54 kJ and an activation energy of Ea=81 kJ. What is the activation energy of the reverse reaction
A chemist needs to determine the concentration of a solution of nitric acid, HNO_3. She puts 865 mL of the acid in a flask along with a few drops of indicator.
What are some advantages of supercritical CO2 as a mobile phase for chromatographic separations
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