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Estimate the ethylene glycol C2H6O2 mass in gram that should be added to 12.0 L of water to produce a solution for use in a car's radiator as antifreeze that freezes at -23.3oC. Assume the density of water to be 1.00 g/mL and Kf = 1.86oC .kg/mol.
Assuming Kf= 478Kg/s^2, calculate and compare the fraction of molecules in the first excited vibrational state at 1000K
What is the silver ion concentration in a solution prepared by mixing 387 mL of 0.369 M silver nitrate with 421 mL of 0.564 M sodium phosphate? The Ksp of silver phosphate is 2.8* 10^18
Why two different proteins that are both 1500 amino acids long would travel together through the polyacrylamide gel in a single band containing both of the two different proteins.
calculate the heat in joules released by the dissolving salt. Assume that the specific heat of the solution is the same as thar of pure water(4.184J/g- celcius) and that the calorimeter is perfect.
2 nh3g co2g --gt h2nconh2s h2ogammonia gas at 223degc and 90. atm flows into a reactor at a rate of 550. lmin. carbon
calculate the molar heat of combustion of liquid methanol . a. -8.17 x 105 kJ/mol b. -817 kJ/mol c. 1.88 kJ/mol d. -0.8 kJ/mol e. none of the above
Calculate the pH of a buffer solution made by adding 10.0 g of anhydrous sodium acetate (NaC2H3O2) to 100mL of 0.100 M acetic acid (HC2H3O2).
In an experiment, 0.500 L of 0.020 mol L ^-1 NaOH(aq) is rapidly mixed with an equal volume of 0.020 mol L^-1 HCN(aq). Calculate the time, in seconds, required for this [OH] to decrease to 1.0×10^4 mol L^-1. (Hint: Start from the rate law in the f..
Calculate the temperature (K) of 0.942 mol of nitrogen gas at a pressure of 1.52 atm that occupies a volume of 15.2 L.
protein used as standards on an SDS- polyacrylamide gel are 0.80 and 0.41, respectively. What is the apparent mass of a protein having a mobility of 0.62 on this gel?
Determine the molarity of a solution of the weak acid HCl)2; Ka = 1.10*10^-2 if it has a ph of 1.25.
Input the SMILES string for the final product formed from the following 2 step synthesis. Step 1: (E)-3-methylpent-2-ene is treated with molecular bromine (Br2) in the presence of water in the cold and dark
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