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How much heat is required to convert 46.0 grams of ethanol in the liquid state at 25 degrees C to the vapor state at its boiling point of 78 degrees C, given the specific heat of the liquid is 2.3 J/g-K and its delta Hv is 38.56 kJ/mol?
The Winkler titration for the determination of dissolved oxygen involves the treatment of the sample with iodide ion (I-) in the presence of manganese ion catalyst (Mn2+) as follows.
A chemist wanted to determine the concentration of a solution of lactic acid, HC3H5O3. She found that the pH of the solution was 2.49. What was the concentration of the solution? The Ka of lactic acid is 1.4 10-4.
lead poisoning in children used to be treated with intravenous injections of EDTA. If the concentration fo EDTA in the blood of a patient is 2.55 x 10^-8 M and the formation constant for the complex, [Pb(EDTA)]2-, is 2.00 x 10^18
given the following information, will caco3 be precipitating when Ca2+ = (0.01 mol/l, CO3 2- + HCO3 - + H2CO3 = 0.1 mol/l )
The flask was filled to the calibration mark with water, and the contents were thoroughly mixed. What were the equilibrium concentrations of H+, Na+, H2PO-4 , and HPO-2 in the resultant solution? Ka1 = 7.1x10-3, Ka2 = 6.3x10-8, and Ka3 = 4.2x10-13..
At what pressure does the mean free path of argon at 25 C become comparable to the diameter of a spherical vessel of volume 1.0dm3 that contains it? ? =.36nm^2
1.it is noted that an iron nail was with the 12gms mass absorbs heat of 15 joule you need to calculate the final
If 5.0 mL of . 85 M bleach solution is combined with 45.0 ml of .1 mM dye soultion at 30 degrees celcius, what will bre the therorectical concentration of dye in the reaction mixture after 60 seconds
Calculate the ratio of ionized to unionized drug forms that would exist in the plasma at physiological pH (7.4). What is the percent ionized to unionized
The electron configuration of carbon atom 1s^2 2s^2 2p^2. which of the following term symbols may not exist (^3S1 or ^1S0) explain
how many grams of sodium sulfide are formed if 1.60 g of hydrogen sulfide is bubbled into a solution containing 2.13 g
If copper has a photoelectric threshold wavelength of 279 nm, calculate the velocity (m/s) of the electron emitted when copper is illuminated with light with a frequency of 2.33 × 1015 Hz. Express answer in scientific notation.
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