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You are given a worked wooden item from an archaeological dig believed to date to during the last glaciation. As such, the artifact would be another piece of evidence in favor of the hypothesis that North America was settled prior to the end of the last glaciation. You analyse the artifact and find that it has a specific activity of 2.2 dpm/g. How old is the artifact?
Calculate the pH of this solution? if we want to lower the pH by one unit of this solution then How many mL of 0.1 M H 3 PO 4 should be added to this solution?
Determine how many milliliters of this solution should you dilute to make 100.0mL of 0.250M Ammonia(NH3)?
What mass of barium sulfate is produced when 100.0 mL of a 0.100 M solution of barium chloride is mixed with 100.0 mL of a 0.100 M solution of iron(III) sulfate.
Determine How hot should be the air in a ballon be heated if it has initially a volume of 750. L at the temperature of 20 degree celsius and the final volume must be 1,000.l
Determine the trend in sizes of the ions O 2- ,N 3- , F - and also explain why does the trend exist? Also describe which of the molecules contains polar covalent bonds but is NOT itself a polar molecule?
Show all the steps in the mechanism for the following reaction, When benzene is mixed with deuterated sulfuric acid, deuterium is slowly incorporated onto the ring. Show the mechanism for this reaction and explain how this relates the sulfonation of ..
An empty gasoline can with dimensions 15 cm by 40 cm by 12.5 cm is attached to a vacuum pump and evacuated. if the atmospheric pressure is 14.7 lb/in^2.
When relatively small amounts of magnesium burns, the fires are extinguished using commercially available dry powder. Why might this fire rekindle days later as someone tries to remove the residue with water?
An aqueous solution contains 167 g CuSO4 in 820 mL of solution. Calculate the : a. Molarity b. Percent by mass c. Mole fraction d. Molality of the solution, The density of the solution is 1.195 g/mL
Application of Avogadro's law - To evaluate the volume of a gas using Avogadro's Law.
By Solving this problem student is able to understand how to calculate theoretical and percent yields in an experiment - determine theoretical and percent yields for this experiment.
Determine the energy in joules of a mole of photons coupled with red light of wavelength
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