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1. Explain in detail how glass transition temperature and molecular mobility relate to the following:
Stable drying process
Stable freezing process
Stable freeze drying process
2. Nonfat dried milk is produced by spray-drying skim milk. During dehydration, the water activity (Aw) was monitored as mositure was removed. The graph shown below contains isotherms for dehydration of teh skimmilk, rehydration of teh nonfat dry milk as well as an isotherm for another food (confectionary product) containing large levels of sugar.a.) Identify the isotherm that you would expect to obtain during skim milk dehydration. Provide reason for your answer (use the graph below)b.) Divide the isotherm you have chosen (in a) into regions based on the type of water removed from skimmilk while undergoing dehydration to produce nonfat dry milk. Identify the various types of water repsented in each region.c.) The isotherms shown above were obtained at 25C. Show (Graphically) the effect that determining water activity at 40C would have on the desorption isotherm obtained for the production of nonfat dry milk. Provide reason for your answer.
** x axis = water activity
100.0 g of nickel at 150 degc was placed in 1.00 l of water at 25.0 degc. the final temperature of the nickel-water
a 10.00-mL sample of sulfuric acid from an automobile battery requires 35.08 mL of 2.12 M sodium hydroxide solution for complete neutralization. what is the molarity of the sulfuric acid? sulfuric acid contains two acidic hydrogens.
How many milliliters of an aqueous solution of 0.202 M potassium chloride is needed to obtain 11.4 grams of the salt
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explain why all the solutions iron iii nitrate and potassium thiocyanate used in this experiment were made in 0.1 m
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If Amberlyst 21 has a concentration of active site of 1.25 eq/L and we want to use 100 mL of a solution, how much Amberlyst 21 should we use
Draw a sigma only MO diagram for a generic ML6^n- complex. Label all atomic and molecular orbitals with their proper symmetry designations. Which orbitals are nonbonding and why
using the delta hfdegree sdegree and delta gfdegree data from appendix d in your textbook calculate delta h degree
The vapor pressure of benzene is 53.3 kPa at 60.6°C, but it falls to 51.5 kPa when 19.0 g of a nonvolatile unknown organic compound is dissolved in 500 g of benzene. Calculate the molar mass of the compound.
The nitrogen-nitrogen bond lengths in N2H4, N2F2, and N2 are 1.45, 1.25, and 1.10 A, respectively. Using the Lewis Structures, how can this trend be explained? No formal charges needed?
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