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The freezing point of ethanol (C2H5OH) is -114.6 degrees Celcuus. The molal freezing point depression constant for ethanol is 2.00 Celcius/m. What is the freezing point (celcius) of a solution prepared by dissolving 50.0 g of glycerin (C3H8O3, a nonelectrolyte) in 200 g of ethanol.
Calculate the pH of the solution made by adding 0.50 mol of propanoic acid, (C2H5COOH or HC3H5O2) and 0.30 mol of sodium propanoate (C2H5COONa or NaC3H5CO2) to 1.00 L of water. The value of Ka for C2H5COOH is 1.3 x 10^-5.
You wish to extract an organic compound from an aqueous phase into an organic layer (3 to 6 extractions with a separatory funnel). With regard to minimizing the number of transfer steps,
a flask contains 0.180 mol of liquid bromine br2. determine the number of bromine molecules present in the
A solution consists of 10g of liquid X (MW:50) and 9g of liquid Y (MW:30). The vapor pressures of pure X and Y are 40 and 70 mmHg, respectively, at 20°C. What are Nx and Ny (N = mole fraction)? What is the partial pressure of X over the solution a..
Calculate the activity for CS2 at mole fraction CS2=.722 for a Raoult's Law standard state using the following data: PCS2=446.9 Torr, and P*CS2=512.3 Torr
Calculate the number of moles of solute present in 50.0mg of aqueous solution that is 1.25 molality NaCl.
1. Write the equation for saponification of of glyceryl tripalmitate 2. Write equation for hydrogenation of glyceryl trioleate.
Data: SO2(g) + 1/2O2(g) => SO3(g) ?H = -99kJ Use the data above to calculate the standard enthalpy change for the reaction below. Reaction: 2SO3(g) => O2(g) + 2SO2(g) H
If a wheelchair-marathon racer moving at 13.3 miles per hour expends energy at a rate of 635 Calories per hour, how much energy in Calories would be required to complete a marathon race (26.2 miles) at this pace
1. calculate the h of a solution obtained by mixing 1 l of hydrochloric acid 1.0 m with 1 litre of sodium hydroxide
at a particular temperature n2o5 decomposes according to a first-order rate law with a half-life of 3.0 s. if the
The first ionization energy of a gas-phase atom of a particular element is 6.24 x 10^-19 J. What is the maximum wavelength of electromagnetic radiation that could ionize this atom
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