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The prefix ekacomes from the Sanskrit word for "one." Mendeleev used this prefix to indicate that the unknown element was one place away from the known element that followed the prefix. For example, eka-silicon, which we now call germanium, is one element below silicon. Mendeleev also predicted the existence of eka-manganese, which was not experimentally confirmed until 1937 because this element is radioactive and does not occur in nature. Based on the periodic table shown in Figure, what do we now call the element Mendeleev called eka-manganese?
A 50.00 mL sample of the solution (1L of 0.01000M solution requires 2.14g of potassium iodate), mixed with 2 g of potassium iodide and 10.00 mL of (H_{2}SO_{4}), is fully titrated with 38.50 mL of sodium thiosulfate. What is the concentration of th..
if the freezing point of a 0.107 m CH3COOH solution is -0.200°C, calculate the percent of the acid that has undergone ionization.
Show that the proton condition for a NH4Cl solution is a linear combination of the mass balance equations and the charge balance equation.
They started with 0.47 grams of a mixture containing 0.143 grams of the acid and recovered 0.117 grams of benzoic acid. What was their percent recovery?
Benzene has a boiling point of 80.1 degrees celcius and a molal boiling point elevation constant of 2.53 degrees celcius/m. Calculate the boiling point of a solution containing 15.0 g of the non-electrolyte C6H4Br2 in 125 ml of benzene (sp gravity..
Carbon sequestration technologies are being actively explored by researchers as methods to remove CO2 from the atmosphere, thereby diminishing the greenhouse effect.
Write the net ionic equation for the precipitation of chromium(III) hydroxide from aqueous solution
write the overall equation for the reaction b. Give a detailed reaction mechanism for the reaction showing all steps and intermediates
Calculate the volume in liters of a 0.024 micro M copper (II) sulfate solution that contains 11.0 mol of copper (II) sulfate
the number of moles in .452 grams of naclo4 the number and type of particle in .452 grams of naclo4 is it possible for
You add 2.0mL of 2 M HCL to 1L of .1M HEPES buffer, PH 8.0 (pKa 7.6). Does the HEPES dissociate and how much does HEPES unassociate? Can you explain your answer please?
You then tore off the corner, inserted filter paper in the funnel, and filtered your BaSO4 precipitate. How does this affect the percent sulfate you calculated; too low, too high, no effect
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