What is molality of ethanol
An aqueous solution is 22.0% by mass ethanol, CH3CH2OH, and has a density of 0.966 g/mL. What is molality of ethanol
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At room temperature however, aspirin is not soluble in this particular solvent but all the impurities remain soluble. Describe how to use this solvent to purify aspirin crystals away from the impurities.
Vector r makes angle of 30 degree with x- axis, and 70 degree with y-axis,and it is in the positive octant. vector s makes angle of 45 degree with x-axis , and 60 degree with y-axis , and it is also in the positive octant.
An unidentified organic compound X, containing C,H, and O was subjected to combustion analysis. When 228.4 mg of pure X was burned 627.4 mg of CO2 and 171.2 mg of H2O were obtained. Determine the simplest formula of the compound X.
What would you run as controls to be certain the ferric chloride test was working as predicted? What results would you expect for your control tubes?
Use the dipole moments of HCl and HF ( HCl = 1.08, HF = 1.82) together with the percent ionic character of each bond ( HCl = 20% ionic, HF = 45% ionic) to estimate the bond length in each molecule.
744.5 g of a nonelectrolyte are completely dissolved in sufficient water to make 1.50 L of an aqueous solution at 25.0oC. The osmotic pressure of the solution is 59.9 atm. What is the molar mass of the nonelectrolyte, in g/mol?
An electron in the n=5 level of a hydrogen atom emits a photon wavelength 1282.17 nm. To what energy level does the electron move?
Starting from rest the motorboat travels around the circular path, p=50 m at a speed v=(0.8t) m/s where t is in seconds. Determine the magnitudes of the boat's velocity and acceleration when it has traveled 20 m.
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