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A sample of gas contains four gases (He, Ne, Ar, and Xe) with the following partial pressures: He (43 mm Hg), Ar (835 mm Hg), and Xe (111 mm Hg). If the total pressure in the container is 1355 mm Hg, what is the partial pressure of Ne in the sample?
determine the molarity of a solution of twenty grams of ammonium bromide nh4br in enough water to produce 132 ml of
Why is it preferable to use a metal ion buffer to achieve pM = 7, rather than just dissolving enough M to give a 10-7 M solution?
A mutant hemoglobin has His146 of the beta chain replaced with a threonine residue. predict what the consequence of this mutation might be. specifically
the uncertainty b in some observable b is given by a formula bsqrtltb2gt-ltbgt2. use this formula to determine
There are several slip systems that can be active in olivine (orthorhombic). Dislocation glide is easiest at high temperature in the (010)[001] slip system
If the rate constant at 20 degrees CELSIUS IS 4.3(10^-5). How long would it take for 83% of the compound to decompose ? if the rate constant is 9.0(10^-4) at 55 degrees Celsius what will the activation energy be?
Vapor pressure of pure acetone (propanone) is 266 torr. When a non-volatile solute is added, the vapor pressure of acetone above the solution falls to 232 torr. What is the mole fraction of acetone in solution?
Determine the delta G standard state at 298 K from the following standard state values at T= 298, Determine the delta G standard state at 1000K. assume delta H is independent of temperature
Your Discussion should address at least the following points: 1. What is the structure of each isomer? 2. Which ligands are observed in the IR spectra of the four complexes which you have prepared? What are the symmetries of the ligands in each co..
For a particular sample of copper, two peaks were obtained in the mass spectrum,showing an abundance of 69.10% at m/e 63 and 30.90% at m/e 65. Calculate the relative atomic mass of this sample of copper to three significant figures, using the data g..
Researchers analyzing an unknown hydrocarbon with chemical formula CxHy found that 225 grams of O2(g) were required for complete combustion of 1.0 mol CxHy, to form CO2(g) and H2O(g) only.
The thermochemical equation for the burning of ethyl alcohol is C2H5OH(l) + 3O2(g) --> 2CO2(g) + 3H2O(l) ?H = -1,367 kJ What is the enthalpy change (in kJ) for burning 9.68 g of ethyl alcohol
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