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the following thermochemical data are for 25oc h0f cp h2ol - 286 kj mole-1 753 joule mole-1 k-1 haq 0 0 oh-aq - 230
consider the following mechanism 1 a h reg a rate1 ia excitation of a a constant 2 a a reg a2 rate2 k2aa formation
a steam engine works between th 140c and tc 30c calculate the minimal withdrawal from the hot source to yield 1 kj of
write an expression for da2dt b apply the steady state approximation to a and derive an expression for the steady state
which type of transition isothermal isobaric adiabatic or isovolumetric describes what happens when the canister is
if you want to dope gaas to make an p-type semiconductor with an element to replace as which element would you pick a
in an aqueous solution solvent is h2o how many h-bonds could one molecule of ethanol amine h2n-ch2-ch2-oh participate
for the reaction no2gno3g n2o5g the activation energy is 18 kjmol and the overall delta e is -136 kjmol how times
polypropylene can be made with varying degrees of crystallinity if it is processed to have an amorphus structure where
what is the typical effect of the addition of an interstitial element on the properties of a metal a increased surface
what is a grain boundary multiple answers can be selected 1 a point defect 2 a line defect 3 a two-dimensional
which one of the following materials can be classified as a semiconductor b sio2 ag pb
what is the half reaction occurring at the anode of the voltaic cell in the balanced reaction shown below 3mno4- 24h
if the initial concentration of h2o was 0700m and after 54mins the concentration is measured to be 00875m what is the
how many different 500 d states does hydrogen have make a list showing all of them what are the possible s in
an aqueous solution contains 125 nacl by mass what mass of water in gramsis contained in 25l of the vapor above this
predict what amount in grams this double replacement reaction when 40ml of potassium iodide pbno32 aq 20 ml of leadii
sodium sulfate is slowly added to a solution containing 00500 m ca2 aq and 00360 m ag aq what will be the concentration
the ksp of caso4 is 493times 10-5 calculate the solubility in gl of caso4s in 0500 m na2so4aq at 25
in the zeeman effect the energy levels of hydrogen are split by a magnetic field each state with a different value of
assuming no heat loss by the system what will be the final temperature when 84 g of water at 100oc are mixed with 67 g
a 500-g piece of metal at 203oc is dropped into 4000 g of water at 250oc the water temperature rises to 290oc calculate
a 1000-g sample of copper is heated from 100degc to 1000degc a determine the number of calories needed the specific
which of the following is a forbidden transition please give a brief explanation why you chose your answer a l3 m2 l2
a sample of iron was heated to 1480degc then placed into 368 g of water at 236degc the temperature of the water rose to