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if 88 mg of iodine-123 is used in an experiment how many milligrams of iodine-123 should remain after 50 hours assume
a 40 kg child stands on the edge of a rotating merry-go-round with a radius of 2m the moment of inertia of the
a woman on a rocket traveling at 072c with respect to earth observes a meteor come from in front of her and pass her at
gaseous oxygen is held in two separate containers at identical temperature and pressure the volume of container a is
in chem122 we do an experiment where the charge of an electron may be determined in this experiment a current of 03
infrared light of wavelength 25 illuminates a 020-mm-diameter hole what is the angle of the first dark fringe in rad in
a 200 ml sample of hypobromous acid hbro was titrated with 0180 m koh to reach the equivalence point required 2775 ml
the ksp for aloh3 is 1910-33 what is the ph of a sauturated solution of aloh3 ignore any
a violinist is tuning the a string on her violin by listening for beats when this note is played simultaneously with a
the initial temperature of a 344 g sample of iron is 182 deg c if the sample absorbs 225 kjof energy as heat what is
a calculate the h3o of a solution that has an oh of 0000 0060m is the solution acidic basic or neutralb calculate the
a solution was prepared by dissolving 0450 g mgso4 fw120363gmol in 0500l of water a 500 ml aliquot of this solution
if the rectangular barge is 350m by 240m and sits 0900m deep in the harbor how deep will it sit in the
a 020-kg object is oscillating on a spring with a spring constant of k 15 nm what is the potential energy of the
020 moles of helium gas that initially occupies a volume of 40l under a total pressure of 10x105 pa subsequently
an ideal air-filled parallel-plate capacitor has round plates and carries a fixed amount of equal but opposite charge
arsenic acid h3aso4 is a triprotic acid with a ka15e-3 ka28e-8 and ka36e-10 calculate h oh- h3aso4 h2aso4-haso4 2- and
in a qualitative analysis procedure a chemist adds 02 m hcl to anunknown group of ions and then saturates the solution
after carrying out the reaction why does a precipitate solid form when you pour the reaction mixture on
a super hero leaps with speed 12 ms at a 47 degree angle above the horizontal from the top of a building if he lands 40
a solution is made that is 1510-3 m in znno32 and 0130 m in nh3 after the solution reaches equilibrium what
a heart dysfunction that can cause death is ventricular fibrillation this is an uncoordinated quivering of the heart as
calculate the ph of a solution containing 0085m nitrous acid ka 45 x 10-4 and 0100m
a jet pack is turned on for 10 seconds and performs 1500 joules of work to move an astronaut in space who was initially
if the ka for the acid phenol call it hp is 13 x 10-10 what is the pka of the phenolate ion