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Temperature and Time
Heat transfer occurs both externally when the cold food has energy transferred from, for example, a hot skillet and internally as the heat penetrates the food. Some foods are best cooked by brief exposure to intense heat while others benefit from longer exposure to less intense heat. Please give an example of food best cooked 'hot and fast' and an example of 'low and slow' and explain the chemical and physical changes that the cooking method brings about.
What are the advantages and disadvantages of using methanol, ehtanol and water as a solvent for reactions
What is the pKb for the acetylsalicylate (C9H7O4-) ion in a 0.10 M solution of sodium acetylsalicylate (NaC9H7O4). A. 3.52 B. 10.48 C. 3.0 x 10-4 D. 3.0 x 10-11 E. 8.26
Problem- A 2.6x10-5M solution of a compound in hexane shows an absorbance of 0.36 at 252nm in a cell with a 1-cm light path. What is the molar absorptivity of the compound in hexane at 252nm
when sodium bicarbonate nahco3s is heated sodium carbonate is produced with the evolution of water vapor and carbon
A molecule with a chiral center must be optically active whereas a molecule with two chiral centers may or may not be optically active. Explain and provide examples.
The following density measurements were made on a bar of iron: 7.58 g/mL, 8.02 g/mL, 7.83 g/mL, 7.80 g/mL, and 7.66 g/mL. The accepted value for iron's density is 7.85 g/mL. Find: The error of the average of this set of measurements
An experimental light bulb with a volume of 3345 cubic cm is filled w/a mixture o f 2.9835 g of Argon and 1.441 g of neon in a laboratory at 20 degrees centigrade. Explain what is the internal pressure of the bulb. in kPA
cu/cu^2+ concentration cell has voltage of .21V at 25 c. the concentration of cu^2+ in one of the other half cell is 1.4E-3M. What is the concentration of{Cu^2 + in the other half-cell
The heat of combustion of hexane is 995.0 kcal/mol. How much energy is released during the complete combustion of 453 grams of hexane ?
Explain the prostaglandin precursor arachidonic acid has the molecular formula C20H32O2. Specified that arachidonic acid is an acyclic carboxylic acid that contains no carbon-carbon triple bonds explains how many carbon-carbon double bonds are pre..
what is the molecular weight of a gas if a 250 ml sample of this gas collected over water at 735 mm hg and 28.0degc has
An aqueous solution of 10.0 grams of sodium hydroxide is mixed with an aqueous solution of 10.0 grams iron (III) chloride: 1) What is the formula of the compound that precipitates
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