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the ca content of a powdered mineral sample was examined four times by two methods believed to have similar precision
an unknown metal is found to be arranged in an fcc structure the density of the metal is 891gcm3 and the edge cell
consider the titration of potassium acid phthalate khp with naoh if 04278g khp needed 2286ml of naoh to reach the
in a set of blood samples taken from a patient at different time the cholesterol level was tested and the final result
a mixture of sodium salts may enclose one or more of the anions studied in this experiment all of the salts are readily
specified the ka1 and ka2 for carbonic acid are 44510-7 and 46910-11 respectively find out the alpha value for hco3- at
a 01000 m naoh solution was employed to titrate a 2500-ml solution that contains 01000 m hcl and 00500 m hoac find out
this problem is in schaums draw of college chemistry thus i already have the answer the problem though is that schaums
moles of gas 0125moles while the gas is at room temperature 25degreesc the piston is at 2cm from the bottom of the
in my organic lab we extracted spinach pigments through grinding the leaves as well as adding dichloromethane to the
the reactivities of phenol and aniline in the direction of bromination change when the reaction is performed in
name two intermolecular forces that are mixed up in chromatography and the roles that they play during
a sample of air contains 8583 molesm3 of oxygen as well as 1640 molesm3 of nitrogen at stp 1 atm 0 degrees celsius find
a phosphate buffer solution contains 008 m k2hpo4 and 012 m kh2po4 pka values for h3po4 are 2 68 and 122 compute the
at the big bang the universe extended from a single point into a sphere of radius about five light years rather quickly
for the subsequent reactions look up the delta hf values to compute delta h rxn and s values to evaluate delta s system
the second law of thermodynamics can be stated various different ways one way is to state there is no such thing as a
compound a c9h12 undergoes nitration to give three products the 1h nmr spectrum of a shows a complex three-proton
aregard as the completely reversible folding of the protein myoglobin at 308k for which the enthalpy of unfolding is
an unknown metal is determined to be arranged in an fcc structure explain the density of the metal is 113gcm3 as well
a human typically evolves about 20kj per kg per hour of heat mostly from the oxidation of food the average human is 62
a sample of solid aerosol is collected from a rural area and found to have as composition al2400 mg kg-1 and pb 34 mg
polyaromatic hydrocarbons are usually associated with soot particles as adsorbates on the surace compute the relative
the density of graphite is 25 gml as well as the density of diamond is 35 gml the isothermal compressibity of graphite
a molecule of unknown structure has a molecular formula of c9h8o2 in the infrared spectrum there are absorptions at