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following are balanced equations describing heterogeneous reactions choose the appropriate equilibrium expression for
a compound has a pka of 74 to 100 ml of a 10 m solution of this compound at ph 80 is added 30 ml of 10 m hydrochloric
a draw a heating curve qualitative starting with ice at -20 degrees c going to steam at 200 degrees c indicate the
write the vsepr aformula for the n atom as the central atom in glycine what is the approximate c-n-h bond angle explain
a student following the procedure in this experiment prepared three solutions by adding 1150 2300 and 3450 ml of a 760
a class is provided with the same mass of pbii nitrate but different masses of sodium iodide the masses of lead ii
in a candy factory the nutty chocolate bars contain 220 by mass pecans if 460 of pecans were used for candy last
1an observer fails to check the bubble and it is off two divisions on a 250 ft sight what error results for a
when cl2 gas is added to water during disinfection ofwater it hydrolyzes with water to form hocl the power of acidhocl
sodium bicarbonate and sodium carbonate dissolved in water use to make buffer solution the ka value of carbonic acid is
what mass of pbso4 forms when 125l of 00500m pbno32 and 200l of 00250m naso4 are
describe the preparation of 15l of a 010m cac2h3o22 solutionhow many milliliters of the above solution would be needed
identify which element is oxidized and which element is reduced in the following 4nacl 2h2so4 mno2 agrave 2na2so4
the following solutions were combined280ml of 0250m hno3 530ml of 0320m kohwhat is the concentration of h or oh- ions
predict what will happen when the following pairs of solutions are mixed write the molecular complete ionic and net
what is the minimum pressure in kpa that must be applied at 25degree c to obtain pure water by reverse osmosis from
if the formation of a grignard synthesis does not begin spontaneously when mg metal and a solution of an alkyl halide
at 210 c a solution of 1826 g of a nonvolatile nonpolar compound in 3325 g ethyl bromide c2h5br has a vapor pressure of
at -120degrees c a common temperature for household freezers what is the maximum mass of sorbitol c6h14o6 you can add
if the formation of a grignard reagent does not begin spontaneously when mg metal and a solution of an alkyl halide in
cao can be used as a drying agent one such application occurs when water is added to dry concrete or cement the
what molar ratio of acetic acid to sodium acetate is required to create a buffer solution having a ph of 484 at 25degc
suppose one wanted to make 4-methyl-2-phenyl-2-pentanol if bromobenzene is used as one of the starting compounds what
consider the hypothetical reaction a b reg c with the rate law rate ka2b if the concentration of a is 0650 moll the
serial dilution problem six test tubes are placed in a rack to each tube add 4 ml of saline solution now to the first