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If 8.36 g of an unknown substance is dissolved in 233.5 g of water at 80 degrees Celsius. If the vapor pressure of water at this temperature is 355.1 mmHg. If the vapor pressure of the resulting solution is 348.6, explain what is the molecular weight of the unknown compound?
Acetic acid has a Ka of 1.8 times 10^{-5}. Three acetic acid/acetate buffer solutions, A, B, and C, were made using varying concentrations: 1. [acetic~acid] ten times greater than \rm [acetate]
For example, sulfur undergoes a phase change from the rhombic crystal structure to the monoclinic form at 95.3 °C. Assuming that ?H for this phase change is 0.358 kJ/mol, calculate ?S for this phase change.
The vapor pressure of ethanol is 100 mmHg at 34.9°C. What is its vapor pressure at 65.5C? (?Hvap for ethanol is 39.3 kJ/mol.)
The solution filtered , then we took 25 mL of this unknown acid for titration. we use NaOH base for titration ,the volum of titrated base when it reach the equivalence point was 3.2 mL . and the concentration of NaOH is 0.1 M.
the oxidation of a trans-fat just skip the dehydrogenase reaction step and be catabolized the same as a saturated fatty acid?
CO exhibits an infrared absorption band at 2143 cm^-1 that is attributed to the symmetric stretching transition. Assuming this corresponds to a transition from the v=0 to v=1 vibrational quantum number
Hydrogen gas, H2(g), reacts with iodine gas, I2(g), to form HI(g) by the following proposed reaction mechanism with the listed hypothetical activation energies
calculate the approximate mass of KHP required to react with 40.0 mL of 0.125 M sodium hydroxide in titration.
Gold can be hammered into extremely thin sheets called gold leaf. A 210. mg piece of gold (density = 19.32 g/cm3) is hammered into a sheet measuring 4.2 1.0 ft. What is the average thickness of the sheet in meters? GIVEN: 2.54 cm = 1 inch
The active ingredient in Antabuse, a drug used for the treatment of chronic alcoholism, is tetraethylthiuram disulfide, C10H20N2S4 (fw = 296.54). The sulfur in a 0.4329 g
What combination of properties is responsible for the selection of trinitrotoluene as a military explosive?
Find the theoretical yield and the percent yield if the mass of aluminum is 0.509 and the mass of alum synthesized is 4.99 g
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