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Solutions of hydrogen in palladium may be formed by exposing Pd metal to H2 gas. The concentration of hydrogen in the palladium depends on the pressure of H2 gas applied, but in a more complex fashion than can be described by Henry's law. Under certain conditions, 0.94 g of hydrogen gas is dissolved in 215 g of palladium metal.
(a) Determine the molarity of this solution (solution density = 1.8 g/cm3).
(b) Determine the molality of this solution (solution density = 1.8 g/cm3).
(c) Determine the percent by mass of hydrogen atoms in this solution (solution density = 1.8 g/cm3).
Calculate the rotational partition function of H2O at 298K fromits rotational constants27.878 cm-1, 14.509 cm-1 and 9.287 cm-1
A 20 mg sample of zinc is heated at 10 K min-1, and the peak on the DSC trace has an area of 0.371 W K. Calculate the latent heat of melting of zinc (in kJ mol-1)?
Why do you wash the ether layer with sodium carbonate? 4. Why is this experiment more expensive than the Fisher esterfication process? When is this method perferred?
Copper has two naturally occurring isotopes,63Cu (isotopic mass 62.9396 amu) and 65Cu (isotopic mass 64.9278 amu). If copper has an atomic mass of 63.546 amu, what is the percent abundance of each isotope?
Question- Robinson predicted a carbocation intermediate in the addition reaction of an alkene and CL2. What experimental evidence contradicts this mechanism
a 1004.0 g sample of calcium carbonate that is 95 pure gives 225 l of carbon dioxide at stp when reacted with an excess
Hydrochloric acid is prepared by bubbling hydrogen chloride gas through water. What is the concentration of a solution prepared by dissolving 225 L of HCl(g) at 37°C and 89.6 kPa in 5.25 L of water?
Explain the wall of the flask is periodically rinsed with the previously boiled, deionized water from the wash bottle. Explain how does this titrimetric technique affect the reported percent acetic acid in the vinegar
Question- The 200- mm test tube also contained some water (besides the metal ) that was subsequently added to the calorimeter. considering a higher specific heat for water , will the temperature change in the calorimeter be higher, lower, or unaff..
Calculate the volume (in mL) of a 0.740 M KOH solution that should be added to 4.750 g of HEPES (MW=238.306 g/mol, pKa = 7.56) to give a pH of 7.22.
Assuming no heat loss by the system, what will be the final temperature when 30 g of water at 10.0oC are mixed with 78 g of water at 50.0oC
A solution of NAOCH3 in methanol can be prepared by adding NaH to methanol (CH3OH). A flammable gas is produced as a byproduct. a) write the acid-base reaction that takes place
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