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Which of the following processes are spontaneous? (You may select more than one answer.) a. melting of ice at -10°C and 1 atm pressure b. evaporation of water at 30°C when the relative humidity is less than 100 percent c. water + NaCl(s) salt solution
A 0.9092-g sample of wheat flour was analyzed by the Kjeldahl procedure. The ammonia formed was distilled into 50.00mL of 0.05063 M HCl; a 7.46-mL back-titration with 0.04917 M NaOH was required. Calculate the percentage of protein in the flour.
A protein biochemist attempted to determine the amino acid sequence of a decapeptide. Use the results from the trypsin, chymotrypsin, and cyanogen bromide treatments to suggest the amino acid sequence of this decapeptide.
what is the solubilty of O2 at an elevation of 12, 000 ft where the atmospheric pressure is 0.657 atm? Assume the temperature is 25 degrees celsius, and that the mole fraction of O2 in air is 0.209 at both 12, 000 ft and at sea level.
silver metal may be precipitated from a solution of silver nitrate by placing a copper strip into the solution. what
Place palmitic acid at the middle position. Cis/trans isometry is graded -it may help to draw hydrogen atoms associated with the carbon atoms of the double bond.
Assuming the density of water is 1.00g/mL at ambient temperature, what is the exact volume (in mL) of the 250-mL Erlenmeyer flask?
What is the molarity of a solution that contains 464.3 grams of phosphoric acid, H3PO4, in 3.2 L of solution
Consider a liquid with a vapor pressure of 200. torr at 20.0 oC and a vapor pressure of 400. torr at 50.0 oC. What is the closest value to the normal boiling point of this liquid. A. 357 oC B. 295 oC C. 22.0 oC D. 18.2 oC E. 83.8 oC
Suggest at least two reagents other than sodium borohydride that could be used to carry out the reduction of 9-fluorenone to 9-hydroxyfluorene.
Addition of HBr to 1-phenylpropene yield only (1-bromopropyl)benzene. Propose a mechanism for the reaction and explain using resonance structures why none of the other regioisomer is produced?
How fast must a 143.5 baseball travel in order to have a de broglie wavelength that is equal to that of an xray photon with landa = 79.0 pm
Will a precipitate of Cu(OH)2 (Ksp = 1.6x10-19) form when 10.0 mL of 0.010 M NaOH is added to 1.00 L of a 0.010 M CuCl2 solution
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