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Solid CO2 (dry ice) sublimes at 195 K and its heat of sublimation ?Hsubl = 25.2 kJ/mol. A block of dry ice with a mass of 32.1 g sublimes. What is the entropy change, ?S, of the CO2? (Enter your answer in J/K).
the cytoplasmic concentration is 0.4 micromolar, and the extracellular concentration is 1.5 micromolar, and the membrane potential is -60 mV?
What is the most important attractive forces (London dispersion, dipole dipole, hydrogen bonding) and the number of bonding domains
Draw the Lewis dot structure of phosgene. Include all 3 resonance forms by alternating the double bond among the 3 terminal atoms. Which resonance structure is best?
what is the vapor pressure of water over the solution at 90degrees celcius?
Arsenic Acid (H3AsO4) has Ka values of 2.5*10^-4, 5.6*10^-8, and 3*10^-13. What is the concentration of the HAsO42- dianion in a solution
Determine the molality and molarity of a solution made by dissolving 445 g of NaBr in 2600 ml of water ?
An apparatus to be used in a decomposition study was filled with N2 gas at 400.00 mm Hg and 400.0 deg C. The volume of the apparatus was 400.0 mL.
The burning acetic acid from the previous question is used to heat 1.4 L of water at 22.7°C. Assume all the heat produced in the last question is absorbed by the water => 240kJ. What would be the final temperature of the water?
Consider the Lewis Resonance structure for the chlorite ion. How many total structures can be drawn, and how many of those structures obey the octet rule?
The rate of SN2 of tert-butyl bromide is faster in polar aprotic solvents than in polar protic solvents. Why? a. polar aprotic lower the potential energy of the product.
The oxygen conversion is 82.0%, and the concentration of the ethanol in the product stream is three times that of the aldehyde and four times that of the acetic acid. (a) What is the fractional conversion of ethane. (b) What is the production rate..
Determine the mL KOH needed at the equivalence point and the ph upon the addition of this volume of KOH.
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