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ar is a solid below -189 oc with a face-centered cubic array of atoms and a supposed density of 229 gcm3 assuming that
a current of 507 a is passed through a snno32 solution for 120 hours how much tin is plated out of the
uo for the reaction as2bg -gt2csdg was measured at temperature t in a constant volume calorimeter ho for the reaction
the acid-dissociation constant for an acid-base indicator hin is 00000438 at 600 nm the molar absorptivities are 2230
assume that you have carried out a radical chlorination reaction on r-2- chloropentane and have isolated in low yield
if a and b are both 0135 m then the rate of reaction is 00010 ms a what is the rate of the reaction if a is doubled b
each of the following solutions is separated from a solution containing pure water with a semipermeable membrane
calculate the freezing point and normal boiling point of the following solution 250 ml of ethanol c2h5oh d0780 gml in
photomultiplier tube with 9 dynodes and an applied voltage of -90v applied explain how this set up can generate 107
what reaction pathway is followed when the 1-bromo-12-dimethyl cyclohexane is heated with a concentrated solution of
a 2500-ml sample of well water containing dissolved iron was treated with hydroxylamine hydrochloride ph 5 buffer and
light energy can be described as nhf where n is a number of photons h is plancks constant and f is the frequency of the
a 199-ml volume of a hydrochloric acid solution reacts completely with a solid sample of magnesium carbonate producing
write down the reactions that occurred in each test tube if no reaction occurred then put nr on the product side test
what mass of p4 is required to react with excess oxygen and produce 1642 g of h3po4 if the percent yield is 7545 p4 5
a 292 g mixture of the compounds magnesium oxide mgo and calcium sulfide cas is 821 by mass calcium sulfide the
which of the compounds contain chiral centers a1-bromobutane b 2-bromobutane c 12-dibromobutane d 13-dibromobutane
in climates where snow and ice cover roads in winter some agencies spread solid ice melter on the road suggest and
the equation for the oxidation of ethanol by alcohol dehydrogenase adh is ch3ch2oh nad ch3ch nadh h the extinction
what is the percent ionization of a 13 m weak acid if the ph is 46 the ph of a 0200 m solution of formic acid hcooh is
a chemist dissolves 0151g of pure perchloric acid in enough water to make up 0370l of solution calculate the ph of the
explain why 010 m bacl2 has a higher osmotic pressure that 010 m glucose and explain why molarity and molality are
a certainly gaseous solute dissolves in water evolving 120 kj of heat its solubility at 25 c and 400 atm is 00200 m
a single celled animal lives in a fresh water lake the cell is transferred into ocean water does it stay the same
a sucrose c12h22o11 solution that is 450 sucrose by mass has a density of 1203 gml at 25 c calculate its a molarity b