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body scanners used in hospitals operate with 400 radiofrequency energy.How much energy does this correspond to in kilojoules per mole?
An airbag in?ates in less than 50 msec by the reaction of NaN3 to produce Na and nitrogen gas at 25 ?C. NaN3 → Na + N2 The volume of the airbag is about 30 liters, and it is ?lled to a pressure of 1.4 atm.
Chemical reaction calculations, 1. Unbalanced equation SOCL2(1) + H2O(1) --- SO2(g) + HCl(g). How many molecules of H2O can 35.0 grams of thionyl chloride remove?
Calculate mass, mole fraction and avg. molecular weight of air, Calculate the constituent (a) mass, (b) mole fraction (c)average molecular weight of air at 25 degree centigrade, 1 atm, and molar density of all listed gases
Calculate the equilibrium constant Kc for the reaction. C6H5OH (aq) + NH3(aq) --> C6H5Oâ€" + NH4+(aq)
If the gas is at 23C and 1.0 atm, what mass of helium is in the blimp? The Goodyear blimps, which frequently fly over sporting events, hold approximately 1.85×105 ft^3 of helium.
ethoxypropan-2-ol can be made by the ring opening of an epoxide when sodium ethoxide in ethanol-water is used. A) Draw the skeletal structure of (R)-1-ethoxypropan-2-ol.
Iron is obtained commercially by the reaction of hematite (Fe2O3) with carbon monoxide. How many grams of iron are produced if 25.0 moles of hematite react with 30.0 moles of carbon monoxide?
If ocean consisted of 3.5% salt by mass,what would be the freezing point of the ocean? Assume the Density of H2O= 1.00g/ml and that the whole ocean would freeze at the same temperature everywhere.
How much heat (in kJ) is evolved in converting 1.00 mol of steam at 160.0 degrees Celcius to ice at -45.0 C? The heat capacity of steam is 2.01 J/g and of ice is 2.09 J/g.
Solution A is 2.00 L of a 2.00 M aqueous solution of copper(II) nitrate. Solution B is 2.00 L of a 3.00 M aqueous solution of potassium hydroxide. React the two solutions. Determine the concentrations of all ions left in solution (from part a) and..
Determine the magnesium content (in ppm) of a 100.00 mL sample of drinking water if the following data were obtained. Titrant is 0.0297 M EDTA, 13.71 mL
Calculate how many grams of phosphorus are present in 2.68 moles of phosphorus pentachloride(PCl5) and also determine the numbers of moles of chlorine are present in 3.71 grams of phosphorus pentachloride?
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