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a buffer solution is prepared by adding 020 mole of ammonia and 030 mole of ammonium chloride to enough water to make
suppose that you had a sample containing 75 by weight potassium chlorate and 250 inert nonvolatile material what weight
question when 2 mol of nocl was heated to 225 c in a 400 l steel reaction vessel the nocl partially decomposes
each copperii sulfate unit is associated with five water molecules in crystalline copperii sulfate pentahydrate cuso45
the complete combustion of ethanol to form water and carbon dioxide at constant pressure releases 1790 kj of heat per
the energy levels the electron can occupy in the he ion can be calculated using the energy level equation calculate the
in column chromotography after adding ethanol all of the methylene blue was washed away and after adding sodium
balance each of the following redox reactions and classify it as a combination decomposition or displacement reactiona
a h atom emitts a photon with a wavelength of 434 times 102 nm if the energy of the initial state of the h atom was
the energy levels the electron can occupy in the h atom can be calculated using the energy level equation calculate the
consider a sample containing 200 mol of a monatomic ideal gas that undergoes the following changes from state a to
write a net ionic equation for the reaction that occurs when aqueous solutions of hydrobromic acid and potassium
write a net ionic equation for the overall reaction that occurs when aqueous solutions of carbonic acid and sodium
what volume of a 0113 m perchloric acid solution is required to neutralize 369 ml of a 294e-2 m calcium hydroxide
at liftoff the space shuttle uses a solid mixture of ammonium perchlorate and aluminum powder to obtain great thrust
what volume of a 0395 m sodium hydroxide solution is required to neutralize 276 ml of a 0276 m hydroiodic acid solution
when using 65 ethanol in a trial of thin layer chromatography the rf values were virtually identical for methylene blue
write the correct net ionic equation for the reaction that occurs when aqueous solutions of potassium hydroxide and
an aqueous solution of sodium hydroxide is standardized by titration with a 0266 m solution of hydrobromic acid if 174
in the laboratory you dissolve 153 g of copperii iodide in a volumetric flask and add water to a total volume of 500
mode of inhibition the kinetics of an enzyme are measured as a function of substrate concentration in the presence and
what is the molarity of the solution resulting from the dissolution of 209 g glucose c6h12o6 in 250 ml water116 m377e4
a 10ml sample of pure orange juice was diluted with 40ml ofmetaphosphoric acid solution then 10ml of diluted juice
what are the stereochemical configurations of the two diastereomers of