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the half life of mercury-197 used for kidney scans is 641 hours if a patient undergoing such a scan is given 50 ng of
explain how to make a stock solution of 500 m nacl and then how to use this stock solution to make 25 ml of 010 m
explain how a nuclear fission reaction can be controlled to produce heat for power generation ratherthan an
a voltaic cell consists of an mnmn2 half-cell and a pbpb2 half-cell calculate ecell when pb2 0616 m and mn2 1069 m
you have been asked to review the calculations of an assistant with respect to the calculation of the internal energy
four hundred kgh of steam from a low pressure turbine at 125 atm and 250 c goes into a feed water heater which preheats
a voltaic cell consist of a pbpb2 half cell and a cucu2 half cell at 25 c the initial concentrations of pb2 and cu2 are
you are designing a drier that must evaporate 200 lbh of h2o from sludge by using air air at 70degf and 50 relative
a geiger counter is placed 1cm from a radioactive spill and gives a reading of 12000 cpm at what distance is the
what is the value of the equilibrium constant at 25 oc for the reaction between the pair sns and pb2aq to give pbs and
which of the following is most likely produced by the reaction of a strong acid with a strong basea hbrb kno3c naohd
calculate the molality of a solution of nacl if 40 kilograms of solution contains 320 moles of sodium
calculate the molar concentration of a potassium chloride solution if 24 liters contains 200 moles of kcl calculate the
use the following reaction to find out how many grams of h2o you need to react with 56710-2 moles of li2o li2o h2o
human saliva has a ph of approximately 68 and can be considered a astrong acid bweak acid cstrong base dweak
consider a chromium-silver voltaic cell that is constructed such that one half-cell consists of the chromium cr
when carbonyl compounds are reduced with a reagent such as lialh4 or nabh4 and a new stereogenic center is formed what
the space shuttle carries about 725times104 kg of solid aluminum fuel which is oxidized with ammonium perchlorate
without consulting a periodic table write the grounds state electron configuration of the element having atomic number
what is the change in temperature of a 250 l system when it is compressed to 175 l if the initial temperature was
what is the molarity of sodium chloride in solution that is 13 by mass sodium chloride and that has a density of
calculate the cell potential for the following reaction as written at 81 degc given that cr2 0786 m and ni2 00130 m
provide a detailed mechanism to account for the conversion ofd-fructose into two equivalents of pyruvaldehyde hint
calculate the molecular weight of gas if 385 grams of it occupies 175 milliliters at 695 mmhg and 115 degree