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what is the reason for using a phase transfer catalyst ait is used to transfer the catalyst to the active site of the
a fireman d 590 m away from a burning building directs a stream of water from a ground- level fire hose at an angle of
a solution of a specific vitamin has max 273 nm and a concentration of 651 times 10-7 m the absorbance of the solution
the driver of a car slams on the brakes when he sees a tree blocking the road the car slows uniformly with acceleration
a photon with an initial wavelength of 1380times10-11 m compton scatters from an electron which is initially at rest
calculate grxn at 298 k under the conditions shown below for the following reaction 3o2g--gt 2o2g gdeg326 kj po2 041
calculate the pressure of the sample of gas trapped in the open-tube mercury manometer if the atmospheric pressure is
consider two blocks a and b of mass ma and mb coupled by a spring and resting on a horizontal frinctionless table let
calculate the sodium ion concentration when 800 ml of 32 m sodium carbonate is added to 250 ml of 23 m sodium
in outer space there are two planets that are separated by a distance of 345x108 km these two planets have the extact
diethyl ether has a boiling point of 345 degree c and 1 butanol has a boiling point of 117 degree c both of these
a rocket which is in deep space and initially at rest relative to an inertial reference frame has a mass of 841 x 105
a cell membrane acts as a parallel-plate capacitor with a spacing of 13 nm and filled with water suppose the positive
x rays diffract from a crystal in which the spacing between atomic planes is 0193nm the second-order diffraction
calculate the freezing point and the boiling point of each of the following aqueous solutions assume complete
calculate the freezing-point depression and osmotic pressure at 25degc of an aqueous solution containing 86 gl of a
if 20ml of 10m naoh is added to 45ml of 20m hc2h3o2 what is the ph of the resulting solution at 25 degrees
the mean distance of mars from the sun is 152 times that of earth from the sun from keplers law of periods calculate
a solution is prepared by mixing 00295 mol ch2cl2 and 00350 mol ch2br2 at 25degc assuming the solution is ideal
a projectile is fired vertically from earths surface with an initial speed of 89 kms neglecting atmospheric friction
you spray your sister with water from a garden hose the water is supplied to the hose at a rate of 0105 liters per
the process of boiling a reaction mixture and condensing the solvent vapors back into the reaction vessel is known as
suppose that a 10 l reaction vessel initially contains 10 mol ofo3 and 10 mol of o2 what fraction of the o3 will have
a spaceship of rest length 192 m races past a timing station at a speed of 0780ca what is the length of the spaceship