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The vapor pressure of an unknown compound at 25 degrees C is 94.6 Torr and its enthalpy of vaporization is 30811 J/mol. Estimate the normal boiling point of this compound. assume the enthalpy of vaporization is independent of temperature.
When the band relaxes, the chains return to a tangled state. what happens to the entropy of the band when a stretched band relaxes
consider a .7 L of a buffer composed of 0.4 M HClO and 0.5 NaClO? How many moles of strong base could this buffer withstand?
A solution contains 4.64g KCl in 178 mL of solution. The density of the KCl solution is 1.14 g/mL. What is the molarity,M, for the potassium chloride solution?
This reaction's half life is 35.0 at 680C. If you had 520 mmHg of phosphihne in an 8.00 L flask, how long does it take for the pressure in the flask to rise to standard pressure
Why does LiBr have a stronger lattice energy then LiF Why does NaCl have a higher lattice energy then Mg3N2. ( I thought it would LiF because smaller ion and Mg3N2 because greater charge)
What type of feature will be observed in the EI mass spectrum of chlorobenzene? A) A signal at 112 and a signal at 114 in a ratio of 3:1
A certain reaction has Ho = 29.80 kJ and So = 20.80 J/K. (a) Is this reaction exothermic, endothermic or isothermic (neither)? This reaction is . (b) Does this reaction lead to a decrease, an increase, or no change in the degree of disorder in the..
highlight by clicking on the asymmetric carbons if any, and indicate whether each compound is Chiral and Number of stereocenters
When a 5.60 g sample of solid sodium hydroxide dissolves in 100.0 g of water in a coffee-cup calorimeter, the temperature rises from 22.3 degrees Celsius to 41.6 degrees Celcius.
The half-life of radium-226 is 1600 years. How long will it take for the radioactivity of a sample of radium-226 to decrease from 130 mCi to 10 mCi
When a carboxylic acid is reacted with a strong base, the product is aA.carboxylic acid
What you observed upon the addition of NH3(aq) to magnesium chloride solution / what species are present in the test tube?and what happened when we add NH4Cl?
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