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Exposure to high doses of microwaves can cause damage. Estimate how many photons, with a wavelength= 12cm, must be absorbed to raise the temp of your eye by 3.0 degrees Celsius. Assume the mass of an eye is 11g and its specific heat capacity is 4.0J/gxK.
Suppose 110. mmol of electrons must be transported from one side of an electrochemical cell to another in minutes. Calculate the size of electric current that must flow.
An excited hydrogen atom emits light with a frequency of 1.141 multiplied by 1014 Hz to reach the energy level for which n = 4. In what principal quantum level did the electron begin?
If 2.50 g CuSO4 are dissolved in 8.0 x 10^2 mL of 0.25 M NH3, what are the concentrations of Cu2+, Cu(NH3)4^2+, and NH3 at equilibrium
Nitrogen-13 is used in tracers injected into the bloodstream for positron emission tomography (PET). The half-life of nitrogen-13 is 10.0 minutes. How much time is required for the activity of a sample of nitrogen-13 to fall to 14.2 percent of its..
calculate the massvolume percent of a solution in which 168 of is dissolved in enough water to give a total volume of
you are asked to go into the lab and prepare an acetic acid-sodium acetate buffer solution with a ph of 4.40 plusmn
The vapor pressure of water is 439 mm Hg at 358 K, and the enthalpy of vaporization is 40.7 kj/mol.
If you mix K2HPO4 with NaAc (sodium acetate), what is the net ionic equation for the (potential) H+ transfer? Will it take place spontaneously
Using curved arrows to symbolize the flow of electrons, write the mechanism for the steps involved in the conversion of 9-fluorenone to 9-fluorenol with sodium borohydride followed by aqueous acid
If 323 g of magnesium reacts with excess oxygen to produce 296 g of magnesium oxide, what is the percent yield for the reaction?
Calculate the approximate length of PVA strand assming that each monomer unit contributes two carbon atom diameters to the length
How many grams of nitrogen monoxide are produced when copper metal reacts with nitric acid to form water and 5.92 g of copper(II) nitrate in addition to the nitrogen monoxide?
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