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An aqueous solution freezes at -2.64 ?C.What is the molality of the solution? Assumethat there is no dissociation of the solute andthat kfis 1.75 K · kg/mol.Answer in units of mol/kg.
Calculate the osmotic pressure of a solution that contains 0.151 g of sucrose (MW = 342g/mol) dissolved in 367 g of water at 21?C.You may assume that the density of the solutionis essentially that of pure water.Answer in units of torr.
Question- Radioactive Iodine-125 used for studies of thyroid functioning, has a rate constant for decay of 0.011/day. If you are given a dose of iodine-125 containing 1.6 x 1010 atoms, how many remain after 4.0 days? Assume first order process.
the hydrated radius of hemoglobin is found to be 3.55 nm. How many water molecules hydrate a hemoglobin molecule?
When light of frequency 2.32×1015 s-1 shines on the surface of a metal, electrons are ejected with a maximum kinetic energy of 3.40×10-19 J. Calculate the wavelength of this light.
a how many coulombs are required to plate a layer of chromium metal 0.30 mm thick on an auto bumper with a total area
The rate of the reaction of nitrogen monoxide with oxygen was measured at 25 degrees C. starting with various initial concentrations of reactants NO and O2.
Describe complexation in terms of the Lewis acid-base theory, crystal field theory, and valence bond thoery
If the mixture contained 56 grams CO2, 3.04 mol CO and 9.03 X 1023 atoms of argon, the partial pressure of argon would be about
sketch the curves for the distribution of energy states and their electron popultaions for a metallic conductor, an insulator
Determine mass of water is contained in 2.8 Litres of the vapor in this solution at 55 degree celcius temperature express your answer in grams
By how much will the pH change if 0.025 mol of HCl is added to 1.00 L of the buffer that contains 0.15MHC2H3O2and 0.25MC2H3O2-? UseKa= 1.8 × 10-5for HC2H3O2.
Question- A student reacted 0.054 g of magnesium in a audiometer filled with water and Hcl. the water temperature wa 22.0 C. the barometer read 29.56 in Hg and 50.2 ml of gas wa collected. What was the students calculated value of R? What is the pe..
The leaves of a Rhubarb contain high concentrations of diprotic oxalic acid (HOOCCOOH) and must be removed before the stems are used to make rhubarb pie. If pKa1=1.23 and pKa2=4.19, what is the pH of a .0282 M solution of oxalic acid
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