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A wooden artifact from a Chinese temple has a 14C activity of 34.3 counts per minute as compared with an activity of 58.2 counts per minute for a standard of zero age. From the half-life for 14Cdecay, 5715 yr determine the age of the artifact.
Calculate thePH at the equivalence point in titrating 0.100 M solutions of each of the following with 9.0×10?2 M NaOH for hydrobromic acid (HBr). HCLO2 chlorous acid, C6H5COOH benzoic acid
Give the oxidation state of the metal , its d-electron configuration and the correct names (IUPAC system) for each of the following complexes.
15.0 mL of 0.50 M NaOH is added to a 100.-mL sample of 0.376 M NH3 (Kb for NH3 = 1.8 x 10^-5. What is the equilibrium concentration of NH4^+ ions? The answer is 9.0 x 10^-5 M.
an iron nail weighing 5.10 g is allowed to react with oxygen according to the reaction below.4fe 3o2 rarr 2fe2o3a
When copper is heated with an excess of sulfur, copper(I) sulfide is formed. In a given experiment, 2.33 g of copper was heated with excess sulfur to yield 1.76 g of copper(I) sulfide. What is the percent yield
The iron-chromium voltaic cell utilizes the following reaction with a measured potential of 0.30 V. What is Î"G ° for this reaction?
One mole of He is heated from 200 degree C to 400 degree C at a constant presure of 1 atm . Given that absolute entropy of He at 200 degree C is 810 J/K/mole and assuming He is a perfect gas
What Material would be produces in the electrolysis of the following reagent
its clay concentration and the CEC of the clay be able to estimate the draction of CEC due to organic matter in the sample
A piece of sodium metal reacts completely with water as follows. 2 Na(s) + 2 H2O(l) 2 NaOH(aq) + H2(g) The hydrogen gas generated is collected over water
A mixture of 1.374 g of H2 and 70.31 g of Br2 is heated in a 2.00-L flask at 700 K. The following equilibrium is established: H2(g) + Br2(g) ? 2HBr(g) At equilibrium the vessel is found to contain 0.566 g of H2.What is Kp for this reaction?
What is the relative solubility of benzoic acid in water and methylene chloride?
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