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Utilize the data given here to calculate the values of delta G rxn at 25 degrees Celsius for the reaction described by the equation.
Compound delta G(f) kj/mol
A +387.7
B +531.0
C +402.0
A + B yields C
delta G rxn= ? kj/mol
so find delta G rxn.
The half life of Uranium-238 is 4.5 x 10^9 yr. A sample of rock of mass 1.6 g is found to produce 29 dis/s. Assuming all the radioactivity is due to Uranium 238, find the percent by mass of Uranium 238 in the rock.
A 12V automotive lead-acid battery. Each anode/cathode pair in this schematic cutaway produces a voltage of about 2V. Six pairs of electrodes are connected in series, producing12V.
Explain the following data are given for . Normal melting point, -23C , normal boiling point, 77C; density of liquid 1.59g/ml ;vapor pressure at 25C , 110 Torr.
Camphor (C10H16O) melts at 178.4 degrees C and has Kf=37.7 K/m. A sample of unknown substance that weighs .840g lowers the freezing point of 25g of camphor to 170.8 degrees C. What is the molar mass of unknown substance
An unknown amount of KCl was added to 250 mL of water @ 35 degrees C and formed a clear solution. The temperature was lowered to 25 degrees C, and the solution remained clear. Was the solution at 35 degrees C saturated
an air bubble is expelled by an underwater diver at a depth of 19.0 m. as the bubble rises to the surface the pressure
Write the net ionic equation to show the formation of a precipitate (insoluble salt) when the following solutions are mixed. write none if there is not a precipitate. a)Ca(NO3)2(aq) and Na2S(aq). b)Na3PO(aq) and Pb(NO3)2(aq). c)FeCl3(aq) and NH4NO..
Sodium chloride has a solubility of 35.7g/100mL water. If you have 350mL of water and you add 115g of sodium chloride to it and mix well.
Calculate the standard reduction potential for the reaction for the reaction Cu(III) to Cu(II).
A 130 mL stock solution contains 1.3 M Na3PO4. When 10 mL of the stock solution is diluted to 21 mL, what will the concentration of Na+ ions be?
how much heat is required to convert 27.0 g of ethanol at 23 c to the vapor phase at 78 c in kj? ethanol c2h5oh boils
Alloxanic acid(C4H4N2O5,6.40g,),sodium alloxanate(5.46g) were dissolved in 250.0mL of water. Calculate moles of alloxanic acid dissolved.
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