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Assume you are performing the calibration step of Experiment 8 and you begin with 70 g of water at 20 oCand 70 g of water at 80 oC. After addingthe two portions of water into your calorimeter setup and followingthe procedure outlined in the experiment, you determine thetemperature of the mixed portions of water to be45 oC. What is the heat capacity of the calorimeter?
Give the x value followed by the y value, separated by a comma. Express your answer in the form x,y
Why the temperature of the DSC experiment settings need to be determined via TGA
An absorption measurement of this ASA solution at 275 nm in a UV-vis spectrometer with a 1.00 cm cell was 0.78. The solvent had an absorbance of 0.01 at 275 nm. Measurement of a 4.05x10-4 M ASA standard solution at 275 nm was 0.579.
Use the Rydberg equation to calculate the wavelength in nanometers of the spectral line of hydrogen for which n2 = 4 and n1 = 2.
The forensic technician at a crime scene has just prepared a luminol stock solution by adding 17.0g of luminol into a total volume of 75.0 mL of H2O. What is the molarity of the stock solution of luminol
A solution of a specific vitamin has ?max = 223 nm and a concentration of 8.31 × 10-7 M. The absorbance of the solution at 223 nm is A = 0.180. What is the molar absorptivity of the vitamin at 223 nm?
what is the empirical formula of a compound that has three times as many hydrogen atoms as carbon atoms but only half
How much energy is emitted when electron in hydrogen atom undergoes a transition from n=5 to n=2 level. what is the wavelength of this emission. what is the frequency
Which of the following observations is the strongest argument that in favor of the hypothesis that protein structure and function are related?
Calculate the volume of 6.0 M sulfuric acid H2SO4 solution required to neutralize the excess potassium hydroxide, KOH, solution from the first step of the synthesis. Indicate clearly your calculations and reasoning.
The change in the Gibbs energy of a certain constant-pressure process as a function of temperature was found to fit the expression ?G (J K-1)=-73.1 J +42.8T. Calculate the value of S for the process
What is the hydronium ion concentration of a 0.20 M solution of an acid with a Ka
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