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What is the bond angle expected around the central atom for each of the following compounds: a) OF2 b) BF3 c) CF4?
The steam is comes out of the feed water at 200 C. The water at a flow rate of 500 kg/h enters the feed water heater at 20C. Calculate the feed water exit temperature.
Draw a picture showing the markings on glassware that would allow you to make each of the following volume measurements- 128.77ml 18 ml 23.45
calculate enthalpy change for the quantity of zinc reacted. Be sure to follow the significant figures convention in the answer you report.
Do the same for halogenation of an alkene -- as review. Now we do not have HBr as a product. Explain why not -- in terms of balancing the reaction, especially from the standpoint of H atoms.
A sample of chlorine has two naturally occuring isotopes, the isotope Cl-35 makes up 75.8% of the sample, and the isotope cl-37 makes up 24.3 of the sample. Which of the following statements is true
calculate the heat released when 1.95 l of cl2g with a density of 1.88 gl reacts with an excess of sodium metal at
What factors determine the strength of interaction bwtween two atomic orbitals to form a molecular orbital
By using photons of specific wavelengths, chemists can dissociate gaseous H-I to produce H atoms with accurately known speeds. When H-I dissociates, the H atoms move away rapidly, whereas the relatively heavy I atoms move little. Average Bond Ener..
Subtilisin (Mr 27600) is a bacterial protease that can catalyze hydrolysis of certain amino acid esters and amides. Subtilisin does have a problem, in that it becomes inactivated by oxidation of a methionine Met-222. Subtilisin mutant with Cys rep..
When done in batch mode, industrial scale reations reactants are commonly heated in the reaction vessel until kinetic calculations indicate the 99% of the reactants have been consumed. In the esterification reaction of methanol with acetic acid th..
A 1- flask is filled with 1.20 of argon at 25 . A sample of ethane vapor is added to the same flask until the total pressure is 1.45 .
Benzoic acid is used to titrate an unknown base, and the pH of solution is recorded during the titration. Halfway to the ultimate endpoint of the titration, the pH of solution was recorded at 7.64. What is the value of Kb for the unknown base?
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