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a series of caffeine standards ranging from 40-200 mgl will be used to prepare a calibration curve for an hplc analysis
a suspected case of ingestion of the organophosphate malathion has entered the emergency room a stat pseudo
the beta blocker drug thimolol is expected to reduce the need for heart bypass surgery its composition by mass is 494c
a solution contains some or all of the ions cu2 al3 k ca2ba2pb2 and nh4 the following tests were performed in order on
which of the following statements are correct 1 for gas phase equilibria the partial pressures of reactants and
which options apply to purines and pyrimidines purines 1 contain one heterocyclic ring 2 contain two heterocylic rings
a total of 200 molof a compound is allowed to react with water in a foam coffee cup and the reaction produces 106g of
what product is formed when 5-chloro-1-methylcyclohexene is reduced with a pt catalyst and h2 a
determine the oxidation state for the following element in the compounds indicatedsulfur in h2so4nitrogen in
vitamin c is essential for prevention of scurvy and large doses may be effective in preventing colds combustion of a
at 25c the heat of fusion of aluminum is 106kjmol and the heat of sublimation is 3264 kjmol what is the heat of
11025g of dried carrots were extracted in hno3 the extract was filtered and placed in a 5000ml volumetric flask which
a sample contains a mixture of two dyes a and b the molar absorptivity coefficients for dye a are 4875 at 628nm and
fluorine-18 undergoes positron emission with a half-life of 110 x 102 minutes if a patient is given a 248 mg dose for a
calculate the standard heat formation of carbon disulfide cs2 from its elements c graphite 2 s rhombic -----gt cs2 l
assuming constant pressure rank these reactions from most energy released by the system to most energy absorbed by the
the thermochemical equation representing one process used for the synthesis of ammonia involves the equilibrium shown
over a wide temperature range the reaction m2o3s cs reg ms co2g is spontaneous at low temperatures but
when heated lithium reacts with nitrogen to form lithium nitride 6li s n2 s ----gt 2lin 9s if 123 g of li are heated
using the standard entropy values nog sdeg 2106 j mol-1 k-1 o2g sdeg 2050 j mol-1 k-1 no2g sdeg 2405 j mol-1 k-1
three gases 800 of methane 180 of ethane and an unknown amount of propane were added to the same 100- container at
using the standard entropy values h2g sdeg 1306 j mol-1 k-1 i2s sdeg 11612 j mol-1 k-1 hig sdeg 2060 j mol-1 k-1
which property associated with a chemical reaction is dependent on how the reaction is carried out not on just its
consider the following reaction at constant p use the information here to determine the value of delta-ssurr at 398 k