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If 200. mL of aqueous 0.862 M HCl is mixed with 200. mL of aqueous 0.431 M Ba(OH)2 in a constant-pressure calorimeter of negligible heat capacity. The initial temperature of both solutions is the same at 20.48ºC. The neutralization reaction H+(aq) + OH-(aq) ? H2O(l) has a ?Hº = -56.2 kJ/mol. What is the final temperature of the mixed solution? (Assume all solutions have a density of 1.00 g/cm3 and a specific heat capacity of 4.184 J/g•ºC)
A. 23.9 ºCB. 5.98ºCC. 8.53ºCD. 26.3ºCE. 33.8ºC
Calculate the nuclear binding energy per mole of nuclei of and the binding energy per mole of nucleons for 31P. The required masses (g/mol) are: 1 1H = 1.00783; 1 0n = 1.00867; 31 15P = 30.97376
Indicate the reaction conditions you would employ to accomplish the following: Conversion of tert-butyl chloride to 2-methylpropene to maximize the yield of the elimination product over the substitution product.
The precipitate was filtered, dried, and weighed. A total of 1.55 g calcium flouride was collected. What was the percentage of CsF in the original sample.
Calculate the minimum amount of dichloromethnae required to extract 99% of the 60 mg of caffeine dissolved in 50mL of tea in one extraction.
what it is perscribed for 3.Mechanism of action( for example: how it binds to biological molecules, how it may inhibit enzyme activity.)
The crude copper that is subjected to electrorefining contains tellurium as an impurity. The standard reduction potential between tellurium and its lowest common oxidation state, Te^4+, is Te^4+(aq)+4e-=> Te(s) E°red= 0.57V
Which of the following compounds will yield 1-hexanol when treated with butylmagnesium bromide followed by acid workup? 1-hexanol
A chemical firm was hired to monitor a nearby lake for possible mercury contamination. Several samples were taken at different locations around the lake, including water samples.
A solution of water (1.86) and glucose freezes at 3.95. What is the molal concentration of glucose in this solution? Assume that the freezing point of pure water is 0.00 .
What mass of melamine, C3N3(NH2)3 will be obtained from 162.0 kg of urea, Co(NH2)2 if the yield overall reaction is 80%
A sample of ethane vapor is added to the same flask until the total pressure is 1.45 atm . What is the partial pressure of argon,PAr , in the flask?
A solution is made by dissolving 5.2246g of EDTA in 4.0000 liters of DI water. Assuming the EDTA was dried at 80°C and it still contains 0.3% excess moisture, calculate the EDTA molarity. (0.003499M)
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