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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.
a student performs two melting-point determinations on a crystalline product. in one determination, the capillary tube contains a sample about 1-2 mm in height and the melting range is found to be 141 degree - 142 degree celsius
A sample of oxygen occupies 10.0 L at 4.00 atm pressure. At what temperature will the pressure equal 3.00 atm if the final volume is 8.00 L.
calcium chloride is used to melt ice and snow on roads and sidewalks and to remove water from organic liquids.
Give the repeating unit of the polymers prepared by ADMET polymerization
Calculate the lattice energy for LiF(s) given the following; sublimation energy for Li(s) +166KJ/mol, ?Hf for F(g) +77KJ/mol, first ionization energy of Li(g) +520KJ/mol, electron affinity of F(g) -328KJ/mol, enthalpy of formation of LiF(s) -617KJ..
Making plastic drinking bottles for bottled water requires about 58 million barrels of oils per year (2007). In 2007, 300 million people averaged 114 L of bottled water per person. The average cost of 0.6 L was $1.00. The average charge for tap wa..
Trimethylamine, (CH3)3N, has a Kb= 7.4x 10^-5. What is the percent dissociation of a 0.15 M solution of this base in water
Find the solution of the system of equations and . Give the x value followed by the y value, separated by a comma. Express your answer in the form x,y
The molar solubility of calcium phosphate. b) The molar concentration of calcium ions at equilibrium. c) The molar concentration of phosphate ions at equilibrium.
Explain what is the limiting reactant for the following reaction given we have 3.4 moles of Ca(NO3)2 and 2.4 moles of Li3PO4. Reaction: 3Ca(NO3)2 + 2Li3PO4 ---> 6LiNO3 + Ca3(PO4)2
Combustion reactions involve reacting a substance with oxygen. When compounds containing carbon and hydrogen are combusted, carbon dioxide and water are the products. Using the enthalpies of combustion for C4H4 (-2341 kJ/mole)
draw four different lewis electron-dot formulas for the seo2nbspmolecule. hint one should have two single bonds two
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