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1 a 100 l buffer solution is 0150 m in hc7h5o2 and 0250 m in lic7h5o2 calculate the ph of the solution after the
a 300 lb bungee jumper wants to jump from the top of a 230 ft high bridge and be able to just touch the water below
why is the e isomer of 12-dibenzoylethylene more stable than the z isomer is this why irradiation goes from e to z and
a uniformly charged wire or radius r1002m runs down the axis of a cylinder of inner radius r2006m the potential
how many grams of methane must be combusted to heat 115 of water from 260 to 890 assuming as a product and 100
a 54 ball hangs from a steel wire 180 in diameter and 600 long what would be the speed of the wave in the steal
1 you wish to prepare an hc2h3o2 buffer with a ph of 544 if the pka of this is 474 what ratio of c2h3o2-hc2h3o2 must
three 15 cm long rods form an equilateral triangle two of the rods are charged to 13nc the third to -13nc what is the
why are the kr---kr and intermolecular br---br distances in the solid form of the two elements practically identical
window glass is typically made by mixing soda ash na2co3 limestone caco3 and silica sand sio2 and then heating to 1500
a drop of unknown liquid is placed at the point on a glass surface where internal reflection is occurring at 48deg
a 16 ounce specialty coffee drink contains 216 mg caffeine if all the caffeine is extracted and dissolved in an equal
calculate the molar mass of a a gas that has a density of 198gl at stp and b an unknown liquid for which 333 liters at
a beam of nuclei is used for cancer therapy each nucleus has an energy of 128 mev and the relative biological
compute the angular momentum of the earth arising from the following motionsa earths orbital motion around the sunb
propose a mechanism for the synthesis of 3-nitrophthalhydrazide from 3-nitrophthalic acid include arrow pushing
a baso4 slurry is ingested just before the gastrointestinal tract is x-rayed because it is opaque to x-rays and defines
the solubility of co2 gas in water is 015g100ml at a co2 pressure of 760mmhgwhat is the solubility of co2 in a soft
a copper bar 300 cm long is perpendicular to a field of flux density 080 wbm2 and moves at right angles to the field
a particle with charge q and mass m moves in a horizontal plane at right angles to a uniform vertical magnetic field ba
sulfur dioxide is released in the combustion of coal scrubbers use aqueous slurries of calcium hydroxide to remove the
an automobile having a mass of 1000 kg is driven into a brick wall in a safety test the bumper behaves like a spring
a 140g sample of an unknown gas occupies 108l at a temperature of 30 degrees celsius and a pressure of 750mmhgwhat is
if three 08 m fan blades are connected to a motor and accelerated uniformly from rest to 54 rpm in 7 minutesa determine
when fully inflated a hot-air balloon has a volume of 16 x 105 at an average temperature of 397k and 0985 atmassuming