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A certain substance has a heat of vaporization of 74.45 kJ/mol. At what Kelvin temperature will the vapor pressure be 6.50 times higher than it was at 287 K
What Celsius temperature, T2, is required to change the volume of the gas sample in Part A (T1 = 41celsius, V1= 1770 L) to a volume of 3540 L ? Assume no change in pressure or the amount of gas in the balloon.
the iron oxide reacts to form water vapor and Fe(s) but aluminum oxide remains unreacted. If the residue following heating weighs 1.6446g determine the wight percent of iron oxide in the original mixture.
The metal hydride LiH has a density of 0.77 g/cm3 . The edge of the unit cell is 4.086 . If it is assumed that the H ions define the lattice points, does the compound have a face-centered cubic or a simple cubic unit cell?
Ethanol has {rm mp} = -114.5 ^circ {rm C}, {rm bp} = 78.4 ^circ {rm C} , Delta H_{rm vap} = 38.56 {rm kJ/mol} and Delta H_{rm fusion} = 4.60 {rm kJ/mol}. The molar heat capacity is 113 {rm J / left( K cdot mol right)} for the liquid and 65.7 {rm J..
A mixture of He,Ar, Xe and has a total pressure of 2.60 atm. The partial pressure of He is 0.350 atm, and the partial pressure of Ar is 0.200 atm. What is the partial pressure of Xe
adding a few drops of a strong acid to water will lower the pH appreciably. however, adding the same number of drops to a buffer does not appreciably alter the pH. why
A vertical force of 7 N (in the negative z direction) is required to hold the deflector in place. Determine the mass (kg) of the deflector. Assume the velocity of the water remains constant.
Unfold the enzyme with urea and 2-mercaptoethanol. Then incubate and crystallize it in the presence of the substrate followed by X-ray crystallography.
Draw skeletal structure of major product for 1-iodo-4-methyl cyclohexane when reacted with NaSCh2Ch3
An ammonia/ammonium buffer solution contains 0.49 M NH3 and 0.62 M NH4+. The Kb value of ammonia is 1.8x10^5. Calculate the pH of this buffer.
What is the pH when 50.0mL of a 0.53M solution of CH3NH2 is titrated with 17.70mL of a 0.37M soltion of perchloric acid?
What are the favored geometrical arrangements for ABn molecules for which the "A" atom has 2,3,4,5 and 6 pairs of electrons in its valence shell?
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