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The natural abundance of c-14 in all living things is 1ppt. The half life of c-14 is 5,730 year (+/- 40 years). How old is something (+/-) that is found to have 0.0625 ppt of c-14?
Calculate the hydrogen-ion concentration [H+] for the aqueous solution in which [OH-] is 1 x 10-11 mol/L. Is this solution acididc, basic, or neutral?
When 35.6 L ammonia and 40.5 L oxygen gas react at STP, NO(g) and water are produced. How many grams of NO(g) are produced assuming 100% yield?
Write balanced chemical equations for the following reactions.
If 0.80g of gas occupies 295 mL at 25 degrees celsius and 680 mm Hg of pressure, what is the molar mass of the gas?
Why must you avoid using your hands in handling the magnesium ribbon and the crucible and cover? 2.Why must objects be cooled to room temperature before taking their weights(masses)
Determine What is the final concentration and calculate what is the Ksp of this salt at temperature of 25 degrees Celsius?
Show how many µL of protein sample you will take and add with the desired volume of DTT and Laemmli buffer to make the right concentration of sample.
Lead thiocyanate, rm Pb(SCN)_2, has a K_sp value of 2.00 times 10^{-5}.Calculate the molar solubility of lead thiocyanate in 1.00 it M rm KSCN.
For bipyridine (bipy) determine the maximum number of coordination sites that the ligand can occupy on a single metal ion.
For each of the following, calculate the concentration of Tris, Tris-H+ and the pH of the solution in each of the following solutions.
The vapor pressure of carbon tetrachloride, , is 0.354 and the vapor pressure of chloroform, , is 0.526 at 316 . A solution is prepared from equal masses of these two compounds at this temperature.
Write ionic and net ionic equations for the following reactions. (Use the lowest possible coefficients. Include states-of-matter under SATP conditions in your answer.)
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