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Gelatin is processed collagen that comes from the joints of animals. Collagen is a stable protein consisting of a triple helix - three polypeptide chains wound around each other. When gelatin is mixed with hot water, the triple helix structure unwinds and the chains separate becoming random coils that dissolve in the water. As the dissolved gelatin mixture cools, the collagen forms a matrix that traps water; as a result, the mixture turns into the jiggling semi-solid mass that is recognizable as Jell-OTM. The directions on a box of gelatin include the following: "Chill until slightly thickened, then add 1 to 2 cups cooked or raw fruits or vegetables. Fresh or frozen pineapple must be cooked before adding". If the pineapple is not cooked, the gelatin will not set properly.
Pineapple belongs to a group of plants called Bromeliads. Pineapple contains a protease called bromelin. Proteases hydrolyze peptide bonds.
Explain in about 3 sentences why pineapple must be cooked before adding to gelatin.
Estimate the value of the equilibrium constant at 610K for each of the following reactions. Delta Hf and S for BrCl is 14.6 kj/mol and 240.0 J/mol*K , respectively. Br2(g)+ Cl2(g) --> 2BrCl(g)
During a period of discharge of a lead-acid battery, 402g of Pb from the anode is converted into PbSO4.
What feature of 1,2-ethylenedicarboxylic acid allows the formation of cis trans isomers?
The heat of combustion of bituminous coal is 2.5 × 104 J/g. What quantity of the coal is required to produce the energy to convert 100. lb of ice at 0°C to steam at 100°C
calculate the molarity (M) of the solution when water is added to prepare each of the following: a)25.0 mL of a 18.0 M HCl solution is diuted to 500 mL. b)50.0 mL of a 1.50 M NaCl solution is diluted to 125 mL. c)4.50 mL of a 8.50 M KOH solution i..
A certain weak base has a Kb of 7.40 × 10-7. What concentration of this base will produce a pH of 10.11
Write the mechanism for the formation of 4-chlorobenzanilide from the combination of the following reagents:
Capital V will stand for Vbarr(molar volume) (P+(a/V^2))(V-b)=RT is the van der Waals equation and when it is solved for V you obtain cubic equation V^3-(b+(RT/P))V^2+(a/P)V-ab/P=0
a solution contains the sodium salt of an anion. the followingtests are performed to identify the anion.1 the solution
Hydrogen atoms that are bonded to an sp3 hybridized carbon atom normally appear between 0.9 - 1.8 ppm and are said to be shielded. What would cause the hydrogen atoms bonded to an sp3 hybridized carbon atom to be deshielded and appear downfield
The specific heat of Al and water are 0.90 J/(goC) and 4.184 J/(goC), respectively. Calculate the equilibrium temperature.
Write a balanced chemical equation showing the function of the peroxide. In your equation identify the oxidizing agent and the reducing agent
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