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Can someone define why the components of a methanol-water and carbon tetra chloride-toluene mixture differ from each other in boiling point by about the same amount? The methanol-water mixture can be separated moreeffiently by fractional distillation. Their boiling point are the followings methanol: 64.7,water: 100 c, carbon tetra chloride: 76.7, toluene: 110.6. Their heat of vaporization: methanol: 125.3, water: 536.6, carbon tetra chloride: 46.4, toluene: 86.8.
To resolve an object in an electron microscope, the wavelength of the electrons must be close to the diameter of the object. What kinetic energy must the electrons have in order to resolve a protein molecule that is 8.10 nm in diameter?
calculate the heat of hydrogenation of naphthalene. Does this value provide any evidence for aromatic character in naphthalene?
Perchloroethylene, as well known as perc, is the solvent utilized in most dry cleaning. It consists of C and Cl. Find out the empirical formula of perchloroethylene given that a 2.58-g sample yields 1.37g Co2 in a combustion analysis experiment
The design calls for reheating the liquid after the temperature has dropped to seventy degree Celsius the determine about how many stags and how many heaters are required for this process?
a what is the ground state energy of the electron in a hydrogen atom expressed in units of electron volts ev?b what is
What is the number of grams of NaH2PO4 which are needed to react with 43.74 mL of 0.285 M NaOH. NaH2PO4 (S)+ 2NaOH(aq) ----> Na3PO4 (aq)+ 2H2O (l)
Write the reaction between Fe3+ and SCN- in which [Fe(SCN)3] forms. b) Determine the equilibrium expression for K associated with this reaction
Which of the following processes are spontaneous. (You may select more than one answer.) a. melting of ice at -10°C and 1 atm pressure b. evaporation of water at 30°C when the relative humidity is less than 100 percent c. water + NaCl(s) salt solu..
Is always a metal. Is called a catalyst. The magnesium acts as a reducing agent. How many electrons does each magnesium atom lose? Which family of elements in the periodic table contains the most powerful oxidizing agents?
Show the reaction mechanism when 2-methyl-2-butanol, sulfuric acid(H2SO4), and water are in a mixture
if a 50.0 liter container holds 45 moles of a gas at a temperature of 200 C what is the pressure inside the container
what are the pH and the change in pH after the addition of 0.054 mol hydrochloric acid to the buffer solution?
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