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10 g of compound a is dissolved in 250 ml of water a single extraction with 200 ml of ether was performed after which
an element occurs as a mixture of isotopes the atomic mass of the element is based
-- matter is neither created nor destroyed in a chemical reaction thus the mass of the products of a chemical reaction
solution a is prepared by dissolving 804 g of na3po4 in enough water to make 150 l of solution solution b is 25 l of
how many ml of a 0050 m kmno4 solution are required to oxidize 200 g of feso4 in a dilute
consider the titration of 250 ml of a 0723 m hcl solution with a 0273 m koh solution calculate the hydrogen ion
solid sulfur undergoes a phase transition between monoclinic m and orthorhombic o phases at a temperature of 3683 k and
derive the simplest algebraic form of the error propogation equation to evaluate the uncertainty in d ehere
if the heat released during condensation goes only to warming the iron block what is the final temperature in of the
a certain brand of gasoline has a density of 067 gml if a car has a gas tank compasity of 16 gallons how many pounds of
a patient requires 50 mg of active drug given in pill form all of the drug is absorbed by the gut into the blood stream
construct a multistep synthetic route from ethylbenzene to 2-bromoethylbenzene 3 reagants
a substance with the empirical formula c2hcl has the molar mass of 18144 gmol find the molecular formula of this
calculate the vapor pressure lowering associated with the dissolving of 355 grams of sugar c12h22o12 mm343gmol in 400
use the clausius-clapeyron equation to calculate the temperature at which pure water would boil at a pressure of 400
the shielding of electrons gives rise to an effective nuclear charge z eff which explains why boron is larger than
why would any line in the hydrogen spectrum between 250nm and 70nm belong to the balmer
why acetone has significantly high refractive index when a mixture of acetone and water is
chlorine is more reactive than bromine bromine can be prepared by adding chlorine to an aqueous solution of sodium
the reactant concentration in a zero-order reaction was 0100 m after 130 s and 250times10-2 m after 325s the rate
sulfuric acid in water dissociates completely into h and hso4- ions the hso4- ion dissociates to a limited extent into
ribonuclease s has 8 cysteines which make 4 disulfide bridges total how many ways can 8 cysteines form disulfide
predict the products of each precipitation and acid base reaction balance the completed equation and then write the
identifying the primary species atoms molecules or ions present in an aqueous solution of each of the following
the density of an unknown metal is 894 gcm3 and its atomic radius is 0126 nm it has a face-centered cubic lattice find