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DSC analysis of a polystyrene sample illustrated no peaks in the temperature interval studied. The DSC thermogram showed an inflection in both the heating along with cooling parts of the cycle which were mirror images of each other. Are there any phase transitions practical and if so what order are they?
Determine the activation energy in kj/mol for the following reaction: 2 N2O5(g) = 4 NO2 + O2 from the following data.
the reaction between trans-2butene+potassium tert-butoxide+CHCl3 produces which: meso compund or pair of enantiomers. Explain
Calculate the pH at the equivalence point in the titration of 50 ml of 0.10 M methylamine with a 0.20 M HCl solution.
Utilizing the periodic table arrange the atoms in each of the subsequent sets in order of increasing electronegativity.
whats the concentration of the acetic acid solution? If 10.91 mL of an acetic acid solution required 9.78 mL of 1.0439 M NaOH
When diborane (B2H6) dissociates in either solvents, such as tetrahydrofuran (THF), a complex between borane (BH3) and the ether is formed. (a) In the Lewis sense, what is the function of BH3 as it forms the complex? Explain.
From this information and the atomic mass, calculate the edge length of the unit cell. Now assume that rubidium atoms are spheres. Each corner sphere of the unit cell touches the body centered sphere. Calculate the radius of a rubidium atom.
A certain molecule fluoresces at a wavelength of 400 nm with a half-life of 1.0 ns. It phosphoresces at 500 nm. If the ratio of the transition probabilities for stimulated emission for the S
Show that the van der Waals and Redlich-Kwong equations of state reduce to the ideal gas equation of state in the limit
The chemist discovers a more efficient catalysts that can produce ethyl butyrate with a 78 \% yield. How many grams would be produced from 7.75 g of butanoic acid and excess ethanol
Which one of the following alcohols undergoes dehydration at the fastest rate on being heated with sulfuric acid
How many grams of ammonia are produced if 7.85 L of ammonia is collected at -15 degrees Celsius and 5.93 atm pressure.
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