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Draw a model showing the aqueous Ca2+ and Cl- ions (the ions surrounded by water molecules) showing the correct orientation of water molecules around the cation and anion.
Freon 11 was a favored refrigerant until it was determined to be detrimental to the atmospheric ozone layer. The heat of vaporization of CCl3F liquid is 25.2 kJ/mol and its normal boiling point is 24.0 C. Approximate the entropy of vaporization ..
The first steps in the radioactive decay of 257 Uuh involves the rapid and successive emission of 2 alpha particles. [Note: Uuh is the symbol for ununhexium, which is element number 116.]
Calculate the change in entropy when 1.65 mol of a perfect gas with Cvm= 12 J K-1 mol-1 is compressed from 0.64 dm3 to 0.23 dm3 and at the same time heated from 186 K to 412 K. Hint: Entropy is a state function, meaning that the result is path ind..
calculate the number of joules given off when 32.0 grams of steam cools from 110.0 degc to ice at -40.0 degc. cp of h2o
question a sample of n2g was collected over water at 25 degrees celcius and 730 torr in a container with a volume of
an organic substance has an enthalpy of vaporization of 29.0 kjmol. the compound has a vapor pressure of 524 mm hg at
A solution is prepared from 0.95 grams of H3PO4 ,(Phosphoric acid) and 1.15 grams of HClO4 (perchloric acid) in 150 mili litres of solution then determine how many milliliters of 0.425 M sodium hydroxide( NaOH) is needed.
A solution of methanol, CH3OH, cotains 55.0 grams of methanol in 100. mL of water solution. What is the molarity of methanol in the solution?
caffeine c8h10n4o2 is a stimulant found in coffee and tea. if a solution of caffeine in chloroform chcl3 as a solvent
Calculate the root mean square speed of Br2 molecules at 23 degrees celsius and 40 degrees celsius and 1 atm pressure
How would the absorbance of a NaSCN have been affected if .30 M Fe(NO3)3 had been used in place of .20 M. (In the case that the reaction has been completely driven to FeSCN2+
Draw a structure consistent with the following set of data: a hydrocarbon with a molecular ion at m/z = 68 and an IR absorptions at 3310
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