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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.
2,4,6-Trichlorophenol is considerably more acidic (pKa = 6) than phenol. Draw the resonance structures for the 2,4,6-trichlorophenoxide ion that explain why it is more acidic, and provide ONE sentence explaining the significance of these structures..
Question- Two successive reactions, A B and B C, have yields of 86% and 68%, respectively. What is the overall percent yield for conversion of A to C
question typically an adult will inhale 2.1 l of air per breath. what mass of ozone is taken into the lungs per breath
We wish to lower the freezing point of the water in an automobile radiator to -40 C. The total mass of water present is 12.0kg. For which one for the following compounds would we have to use the greatest mass of solute to achieve this
A mixture consists of lithium carbonate (Li2CO3) and potassium carbonate (K2CO3). These react with hydrochloric acid as follows.
Looking at the table of first ionization energy, if the n=1 shell held 3 electrons max instead of 2, then the first ionization energy for Li(g) would be around _____ MJ/mol.
When 2.11 g of a nonelectrolyte solute is dissolved in 365 mL of water at 25 °C, the resulting solution exerts an osmotic pressure of 845 torr
Problem- A ground state hydrogen atom absorbs a photon of light having a wavelength of 93.06 nm. It then gives off a photon having a wavelength of 397 nm. What is the final state of the hydrogen atom? Values for physical constants can be found her..
A sample of Tl-201 has an initial decay rate of 5.84×104 /s. How long will it take for the decay rate to fall to 319 /s. ( Tl-201 has a half-life of 3.042 days.)
Question- Aniline C6H5NH2 when reacted with picric acid gives a derivative with an absorptivity of 134 cm^-1g^-1L at 359nm. What will be the absorbance of a 1.00 X 10^-4 M solution of reacted aniline in a 1.00 cell
Why are acetyl chloride or acetic anhydride used instead of acetic acid in preparing esters of acetic acid
Compute the equilibrium concentrations of each ion in the final solution resulting from the mixing of 40.00mL of 0.0450 M MgI2 and 60.00mL of
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