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Acetylsalicylic acid (aspirin), HC9H7O4, is the most widely used pain reliever and fever reducer in the world. Find the pH of 0.045 M aqueous aspirin at body temperature (Ka at 37°C = 3.6 10-4)
Calculate the vapor pressure of water above a solution prepared by dissolving 35.0 of glycerin () in 135 of water at 343 . (The vapor pressure of water at 343 is 233.7.)
What are the hypothesized direct relationships implied by the SEM model and identify the exogenous and endogenous variables.
Monothiocarbamate complexes of Fe(III) have been prepared. For the methly and ethyl complexes, the magnetic moment, μ, is 5.7 to 5.8 μB at 300K, changes to 4.70 to 5 μB at 150K, and drops still further to 3.6 to 4 μB at 78K.
A stone is dropped from rest into a well. The sound of the splash is heard exactly 2.00 s later. Find the depth of the well if the air temperature is 14.0°C. meter
A bottle of wine contains 12.5% ethanol by volume. The density of ethanol is 0.789 g/cm3. Calculate concentration of ethanol in wine in terms of mass percent and molality.
Draw the payoff trees of each assets
A diver pushes off horizontally from the top of a vertical cliff that is 40.0 m high from water surface below. How long is the diver in the air
a) Use Planck's equation (E = hv) to determine the energy, in kilojoules per mole, of radiation of frequency 2.12×10^14 (s^-1). b) What electron transition in a hydrogen atom, starting from the orbit 10, will produce light of wavelength 380 nm
Discuss some of the advantages and disadvantages of the WHO protocol versus the single test. Give the assumptions that you have made in carrying out calculations.
How many tons of ice cream will the factory produce? how much does it pay in emission fees? what are its profits?
At the point of equilibrium there were 82.63 g of Br2(l). Determine the total pressure in the 50.0 L container at equilibrium.
What is the expected vapor pressure when 58.9 g of hexane (C6H14) is mixed with 44.0 g of benzene (C6H6) at 60.0 °C? Given
when sulfuric acid is a component of polluted air it chemically attacks statues memorials and monuments made from
The product formed by the reaction of 3-methyl-1-butene with mercuric sulfate and sulfuric acid is?
degree C and 600. torr contains 50% helium and 50% xenon by mass. what are the partical pressures of individual gases?
a solution is prepared by adding 80.0 ml of 0.090 m hbr to 130.0 ml of 0.50 m hi. calculate the concentrations of all
determine the amount of heat (in kJ) given off when 1.42 * 10^4 g of NO2 is produced according to the following equation : 2 No(g) + o2(g) --> 2NO2(g) H = -114.6kj
a solution contains chromiumcr3 ion and magnesium mg2 ion. the addition of one litre of 1.55m sodium fluoride solution
Construct a spontaneous voltaic cell using the following materials: A Ni(s) electrode, a copper electrode, a 1.0 M Ni(NO3) (aq) solution and a 1.0 M CuSO4 (aq) solution.
The enthalpy of fusion of ethanol is 5.02 kJ/mol, and its enthalpy of vaporization is 38.56 kJ/mol.
An equilibrium mixture contains .870 mol I2, and .290 mol H2 in a 1.00 L flask. I found the equilibruim constant to be .172 which is correct.
Calculate the molar concentration of OH- ions in a 0.540 M solution of hypobromite ion (BrO^ -\K_b = 4.0* 10^- 6.)
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