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a galvanic cell is composed of these two half cells co2aq 2e- cos -028 volt cd2aq 2e-cds -040 volt the actual
given actual yield of aspirin147g percent yield518 theoretical yield 284 1 a how many grams of aspirin were lost in the
when steam condenses to liquid water 226 kj of heat is released per gram the heat from 168 g of steam is used to heat a
explain why recrystallization as a general technique is usually effective at removing a few percent of impurity even
consider the titration of 500 ml of 0100 m hc3h5o2 by 0100 m koh for the following questions ka for hc3h5o2 13 x 10-5
when the molecular weight of a volatile liquid is calculated from the weight volume temperature and pressure of a
calculate the equilibrium constant at 25 degrees celsius for the reaction 4feaq o2g 4h ----gt fe3aq
for a particular reaction hdeg is 735 kj and s is 1937 jk assuming these values change very little with temperature
a compound is observed to follow first order reaction kinetics with a half-life t12 of 8 s how long will it take the
calculate the energy released per mole of deuterium consumed for the following fusion reaction 21 h 31 h -gt 42 he 10
calculate the activity for cs2 at mole fraction 722 for a henrys law standard state using the following data 4469 torr
consider the titration of 500 ml of 20 m hno2 ka 40 x 10 -4 with 10 m koh at each step of the titration a write a
the addition of 2160 g of an unknown metal at 800degrees c to 2000g of water at 210degrees c resulted in a final
the molar nuclear mass of fluorine-19 is 1899840 gmol the molar mass of a proton is 1007825 gmol the molar mass of a
calculate the activity for cs2 at mole fraction cs2722 for a raoults law standard state using the following data
what percent of a sample of cesium-137 first order beta negatron decay with t12 30 years remains after 100 years what
imagine a universe in which ms m sub s the value of can be 12 0 and -12 assuming that all the other quantum numbers can
when the oxide of generic metal m is heated at 250 degc only a negligible amount of m is produced o2m s lt--gt m s o2
a critical reaction in the production of energy to do work or drive chemical in biological systems is the hydrolysis of
when 550 g of is added to 10000 g of water in a container open to the atmosphere the reaction shown below occurs and
a 250 g sample containing as2o5 na2haso3 and other materials is dissolved and neutralized the asiii is fully titrated
al3 is reduced to als at an electrode if a current of 275 amperes is passed for 36 hours what mass of al is deposited
calculate the equilibrium constant for the reaction below at 25 degrees c cos 2 cr 3aq -gt co2aq 2 cr2 aq given the
what is the ph of the solution at the cathode if eo cell -0362v for the following electrochemical cell at 25 degrees c
a use coulombs law to calculate the ionization energy in kjmol of an atom composed of a proton and an electron