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A piece of wood found in an archaeological dig has carbon-14 activity of 5 counts per minute (cpm). New wood has a cpm of 40. The half-life of carbon-14 is 5730 years? What is the age of the wood?
Determine what would be the concentration of the final solution If you take a ten mili litres portion of the stock solution and dilute it to a total volume of 0.250 Litres,?
For the reaction 2Mg(s) + O2(g) ? 2MgO(s), how many moles of O2 are required to react completely with 0.0232 moles of Mg
draw Lewis Structures for the following FIVE elements.
a beaker with 195ml of an acetic acid buffer with a ph of 5.000 is sitting on a bench. the total molarity of the acid
Explain why methyl alcohol (CH3OH) is soluble in water in all portions, while stearyl alcohol [CH3(CH2)16OH] is a waxy solid that is not soluble in water.
You need to balance the number of packages of buns (which usually contain 8 buns) with the number of packages of hamburger patties (which usually contain 12 patties) and the number of jars of pickles (which contain 18 slices). Assume that each ham..
question a silver ball is suspended by a string in a vacuum chamber and ultraviolet light of wavelenght 200nm is
Explain the hazards of chemical burns other than tissue damage
Which of the following statements is true about p-type silicon semiconductors? a. It is produced by doping Si with P or As. b. It does not conduct electricity as well as pure Si. c. Electrons are the mobile charge carriers. d. All are true. e. Non..
The unit cell for tin has tetragonal symmetry, with a and b lattice parameters of 0.583 and 0.318 nm, respectively. If its density, atomic weight, and atomic radius are 7.30 g/cm3, 118.69 g/mol, and 0.151 nm, respectively, compute the atomic packi..
Assume that most of the electromagnetic energy from the sun is the visible region near 500 nm. Calculate the maximum value of the work function for a metal to be used in photovoltaic cells to convert solar energy into electicity.
If the reaction reaches 90.0% of completion (90.0% of the limiting reactant is consumed), what are the partial pressures of each of the products in the flask at 275 K?
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