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Calculate the molar heat of neutralization in kJ when 500cm3 of 2M HCl reacts completely with the same amount and concentration of sodium hydroxide and the temperature rise being 13.70C. Take specific heat capacity of solution to be 4.2 Jg-1 0C-1 and the density of solution to be gcm-3
Briefly explain why caffeine will prefer the methylene chloride solvent to the water solvent? draw the structure for all 3 compounds?
Complete the titration of a weak diprotic solid acid. You take 178.0 mg of the solid acid as well as dissolve it in about 50mL of distilled water. You titrate with 0.095 M NaOH as well as arrive at an endpoint at 25.20mL.
During a heart attack, blood flowing to the heart muscle is interrupted by blockage of a coronary artery. How would you expect the metabolism in the heart to change
According to the Bohr model the allowable energies of the hydrogen atom are specified by the equation- E = (-21.7 x 10-19)/n2 J. Which of the subsequent electron transitions will produce a photon of the shortest wavelength in the Bohr hydrogen ato..
Of sublimation, recrystallization, distillation, and extraction, which purifications methods should be used to purify the following: a) a crude solid mixture that is 90% pure
Which of the following changes to a voltaic cell would cause an increase in potential (i.e., more positive Ecell)
NaBH4 and ethanol are utilized in the reaction to add hydrogen to a carbonyl group and the OH hydrogen comes from the ethanol. The mechanism is a reduction. Demonstrate the mechanism and all steps involved in the reaction.
An electron traveling at 2.5×105m/s has an uncertainty in its velocity of 1.18×105m/s . What is the uncertainty in its position? Express your answer with the appropriate units.
a mixture of gases collected over water at 14 degrees celcius has a total pressure of 0.981 atm and occupies 55 ml. how
The decomposition of a compound, A, to form B + C is known to be a first order reaction. If the half-life of the reaction is 1.96 minutes at 65 °C, what is the value in min-1 of the rate constant for the reaction at this temperature
0.2356 g sample containing only NaCl and BaCl2 yielded 0.4637g of dried AgCl. Calculate the percent of each compound in the sample.
What minimum concentartion of Na_{2}SO_{4} will trigger the precipitation oftthe cation that precipitates first? Barium sulfate Ksp = 1.07 x 10^{-10} and calcium sulfate Ksp = 7.1 x 10^{-5}
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