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Explain a sodium-23 nucleus has a mass of 22.99373amu. Explain how much energy, in KJ is needed to separate the following into individual protons and neutrons?
a) A single sodium-23 nucleusb) A mole of sodium-23 nuceli
If a solution is made of naphthalene in heptane and has a vapor pressure of 82 torr, what is the mole fraction of naphthalene? Assume ideal solution behavior.
The pKa of hydrochloric acid is about -6. On the basis of this information, would aqueous sodium chloride be sufficiently basic to deprotonate benzoic acid? Explain your reasongin.
Which is the best acid to use in the preparation of a buffer with pH = 9.3?
A solution of 0.10 M sodium acetate is mixed with a solution of 0.10 M acetic acid (Ka = 1.8*10^-5). When equal volumes of the two solutions are mixed together the resulting mixed has a pH of:
Calculate the molality of a 20.0 per cent by weight aqueous solution of NH4Cl. (Molecular weight: NH4Cl = 53.5) (b) If this NH4Cl solution is assumed to be ideal and is completely dissociated into ions, calculate the vapor pressure of this solutio..
the average number of collisions per cubic meter per second for the molecules of argon at 0 degree Celsius and 1 bar of pressure. (d) what values would be obtained at 1000 degree celsius and 1 bar? (e) At 0 degree celsius and 100 bar
Write an empirical formula for each of the following. (using the format CO2 for CO2.) (a) Ethylene glycol, car antifreeze, molecular formula C2H6O2
Starting with benzene, outline a synthesis of each of the following (many of the answers will require more than one step): 1-phenylcyclopentene, trans-2-phenylcyclopentanol
Liquid nitrogen trichloride is heated in a 2.11-L closed reaction vessel until it decomposed wholly to gaseous elements. The resulting mixture exerts a pressure of 768 mmHg at 68°C.
starting from alcohol that contains four or less carbon atoms and from benzene and toluene,
why was the titration performed by the addition of permanganate solution to oxalate solution and not the other way
How many grams Na3PO4 of will be needed to produce 475 mL of a solution that has a concentration of Na+ ions of 0.900 M ?
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