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An organic sample (3 grams mass) is taken from an archeological site. The sample has a beta emission rate of 4.3 counts per minute. These decays originate predominantly from carbon-14 with a half-life of 8270 years. If the abundance of carbon-14 in living matter is 1.2e-12, what can you deduce about the approximate age of the site?
Could you show how to do this in step by step.
The nature of the intermediates in E1 and Sn1 reactions are carbocations. If the molecule doesn't follow that formula then it has either double bonds or rings or both.
Iron(III) is polarographically reduced to iron(II)at potentials more negative than about +0.4V versus SCE and is further reduced to iron(O) at -1.5V (vs SCE). Iron(II) is also reduced to metal at -1.5V.
One mole of an ideal gas is heated from 100 C to 322.4 C at constant VOLUME. Report the heat added (in kJ and three significant digits) to this gas to achieve this heating
Write the reduction half-reaction occuring at the C(s) electrode. (Include physical states of reactants and products.)
What would be the percent by mass of NaI solution prepared by dissolving 95 g NaI in 450 g water?
A 10.0 long cylindrical glass tube, sealed at one end, is filled with ethanol. The mass of ethanol needed to fill the tube is found to be 11.90 . The density of ethanol is 0.789 . what is the inner diameter of cylinder?
before a plate is developed. What would happen if a plate were developed in a jar with an atmosphere not saturated with solvent vapor?
How is the ideal gas law modified to account for the finite volume of molecules? The temperature of the sea bed 60 m below the surface and at the surface are both 20C. A rubber balloon is inflated at the sea bed with 2.0 mole gas neglecting the wo..
Balance the following equation in acidic solution using the lowest possible integers and give the coefficient of water.
Determine the pH of a Na_2HPO_4 solution in which the formal concentration of NaHPO_4 is F= 0.00183 M
A 75 mL solution of 0.030 M Ca(OH)2 is titrated with 0.035 M HCl. Calculate the pH of the mixture after 60 mL of HCl have been added.
The boiling point of the solvent and of the solution and the weight of the solute and solvent. The freezing point of the solvent and of the solution and the weight of the solute and solvent.
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