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in a design of a tower water is chilled from twa 65degf to twb 45degf the inlet water is wa 1000 lbh calculate the amount of water that
a given the values below calculate the concentration of benzoyl peroxide required to prepare polystyrene with a number average molar mass of 400000
consider 11 stoichiometric polymerisation of 14-diaminobutane with sebacoyl chloridea write down a balanced chemical equation for the polymerizationb
discovery of sub-atomic particles the atomic theory of the greek philosophers leucippus and democretus 400 bc held that continued subdivision of
calculate the concentration of the naoh solution you have prepared on the basis of the measured mass of the pellets used in the solution
1 consider a platinum crystal structure fcc rpt 139 nma sketch the 100 110 and 111 planes including the atoms in the second layer if they
in the industrial production of sulphuric acid so3 is carefully reacted with waterso3 h2o rarr h2so4any excess so3 giving rise to what is called
a discuss with the aid of diagrams and with suitable examples the chemistry including half-cell reactions construction and principles of the
a explain in terms of ionic equilibria why the aqueous solution of a salt derived from a weak acid and a strong base eg sodium phenolate has a ph
a describe how you would carry out a series of experiments to determine the molar conductivities lambdam of an electrolyte at various concentrations
q1 the complexes of fe2 with 1 10- phenanthroline has a molar absorptivity of about 11000 lmol cm in water at 510 nm a 20 ml water sample thought
1 the ph of a 002 m solution of an acid was measured as 46 a what is the h of the
a chemical transport barge routinely carries chemicals across lake futura in an unfortunate incident the chemical transport barge carrying a solution
a reverse osmosis membrane is used to desalinate high salinity groundwater it is proposed to build an ro plant that will process about 500000
question does the number of steps in a reaction process affect the enthalpy change of the overall reactionhypothesisto compare experimental data to
write a list of reduction half reactions for fe fe3 cu cu1 pb
low value of electrode potentialmn3mn2 for scandium shows sc3 is stable while comparitively low value of electrode potentialmn3mn2 for vanadium
1 discuss how such discoveries technological advancement and breakthroughs were achieved and the person behind this advancement it can be local or
1 define or explain the following termsa scienceb experimentationc scientific methodd hypothesise theoryf scientific lawg
1 a reacting pt2 with two equivalents of each of the ligands no2- and en it is possible to prepare several complexes that could be described as
compound reacts with oxygen to form 2 oxide x and y or analysis 1535g of x yielded 1365g of copper and 1545g of y yielded 16 adetermine the
low-grade phosphate rock can be upgraded by flotation processing in this process the low-grade rock is grounded into a powder and suspended as a
what are the unique properties of what are the unique properties of
pennies made after 1982 are made of 975 zinc and 25 copper instead of 95 copper and 5 zinc pree 1982 pennies weighed 310g the penny contained 295g of
read the recent tribunal case taylor v archicentre ltd general 2012 nswcttt 348a provide a summary account of the key