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A good yield of photosynthesis for agricultural crops in brightsunlight is 20kg of carbohydrate (for example, sucrose) per hectareper hour. (1 hectare = 104 m2.) The netreaction for sucrose formation in photosynthesis can be written
12CO2(g) + 11H2O(l) --->C12H22O11(s) +12O2(g)
a) Use standard enthalpies of formation to calculateΔH0 for the production of 1 mol of sucrose at 25 Cby the reaction above.
b) Calculate the energy equivalent of photosynthesis that yields20kg of sucrose (hectare h)-1.
c) Bright sunlight corresponds to radiation incident on the surfaceof Earth at about 1 kW m-2. What percentage of thisenergy can be "harvested" as carbohydrate in photosynthesis?
Calculate the vapor pressure at 20?C of a solution containing 3.641 g of naphthalene in 22.7 g of chloroform (CHCl3). Naphthalene (C10H8) has a low vapor pressure and may be assumed to be nonvolatile. The vapor pressure of chloroform at 20?C is 15..
What volume of hydrogen gas, in liters, is produced by the reaction of 4.17g of iron metal with 60.0 mL of 3.00M HCl?
Suppose the pH of the water is 4.59 and that the concentration of iron(II) in the water is 7.99x 10-5 M, what is the potential of the corrosion reaction under the above conditions at 298 K?
Calculate an approximate delta_h in kilojoules for the industrial synthesis of ethyl alcohol from ethylene: C2H4(g) + H2O(g) -> C2H5OH
To what volume must 558 mL of 13 M Ca(OH)2 solution be diluted to make a 3 M Ca(OH)2 solution?
If 0.25 mol of Br2 and .55 mol of Cl2 are introduced to a 3.0 L container at 400K, what will be the equilibrium concentration of Br2?
What is the molar concentration of Br^- ions in a 0.235 M aqueous solution of FeBr3, assuming complete dissociation?
What is the [OH-] of a buffer that consists of 0.700 M methylamine CH3NH2 and 0.848 M methylammonium chloride CH3NH3Cl? pKb of methylamine is 3.35. Use E notation and 3 significant figures.
the final temperature of both the water and metal is 32.81 degrees C. The specific heat of water is 4.184j/g*K. What is the speciic heat of the metal?
A lab rat weighs 265 grams and absorbs 1.67*10^13 beta particles eash with an energy of 2.2*10^13u. If relative biological effectiveness is .75 what is the dose. a)1.04*10^-2 sV b)1.3*10^-2 sV c)1.04*10^-5 sV d) 1.39*10^-5 sV e)6.23*10^-13 sV
a reaction that contributes to the depletion of ozone in the stratosphere is the direct reaction O(g)+O3(g)-->2O2(g) at 298K the rate constant is 4.8*10^5M-1s-1 use delta H values from appendix C to estimate
calculate the equilibrium concentration of Ag+(aq) in a solution that is initially 0.200 M AgNO3 and 0.810 M NH3,
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