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what would be the ph of a buffer system containing 10 m nh3 and 010 m nh4cl kbnh3 18 x
a sample of 15 g nawo4 dehydrate is dissolved in 25 ml di h2o 75g granulated zn was added then heated to 70 c 75 ml of
a beaker with 200 ml of an acetic acid buffer with a ph of 500 is sitting on a benchtop the total molarity of acid and
the 2s and 3s atomic orbitals of the h atom are orthogonal if they are both spherical in shape so what makes them
the composition by mass of methyl alcohol ethyl alcohol n-propyl alcohol and water in two solutions a and b are given
a 5000g sample of pesticide was decomposed with metallic sodium in alcohol and the liberated chloride ion was
what happens when an inert gas is added to an equilibrium state with out change in pressure
a chemist creates a buffer using benzoic acid ka63010-5 and sodium benzoate by mixing 5000ml of 0950m benzoic acid with
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what is the normal boiling point in of a solution prepared by dissolving 150g of aspirin acetylsalicylic acid in 7500g
explain how you would prepare 5000ml of a solution that is 0100m h2so4 from concentrated 180m h2so4 which is a liquid
what is the freezing point in of a solution prepared by dissolving 480 of in 110 of water the value of for water is 186
a particular reaction is spontaneous at 450k the enthalpy change for the reaction is 345 kj what can you conclude about
for a particular reaction it was found that the reaction rate was 16 times faster at 35oc than it was at 25oc it was
a somebody puts an expandable balloon on the opening of the bottle without any gas escaping the outside pressure is
for the following reaction cog 2h2g ch3ohga what is the value of the equilibrium constant of the reaction at
a typical calibration curve for emission spectroscopesuch as icp or fluorescence is linear at low analyte
identify and descrine the structure and function of specialised cells of protection sensation and secretion in the
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a a sealed glass bottle at room temperature is half-filled with ethanol slowly the temperature is lowered describe what
the blank solution used to calibrate the spectrophotometer is 100ml of 02m feno33 diluted to 250ml with 01m hno3 why is
ethylene gas rmc2 rmh4 reacts with water at high temperature to yield ethyl alcohol rmc2 rmh6 rmohow many grams of
at beginning of the work up stage of the lab procedure the two phase reaction mixture probably contains the
if an electron has a mass of 9709x10-31 kg and a proton has a mass of 1672x10-27 kg approximately how many electrons