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When silver tarnishes, silver metal reacts with the element sulfur to form a gray deposit of Ag2S. If Ag reacts with S to form this compound, identify which element is being oxidized and which is being reduced. Explain how you know that this is true. Make sure to describe which atoms are gaining and losing electrons and explain why this happens.
The final temperature of the mixture is 27.0 degrees celsius. What is the heat capacity of the unknown substance?
at a temperature of 25 degree celsius and a pressure of 757 mm hg the product gas h2 is collected over h2othen
What is the difference between the end point and equivalence point in a titration? How can you tell them apart?
Problem- In the organic chemistry lab, in the experiment "Synthesis of Nylon-6,6 polymer by step-growth (condensation) polymerization from adipoyl chloride and 1, 6-hexanediamine monomers, explain why a 25% NaOH solution is used.
Problem- Calculate the pH of the cathode compartment for the following reaction given Ecell = 3.01 V when Cr3+= 0.16 M, Al3+= 0.29 M, and Cr2O72- = 0.55 M.
Non-Bridging Calcium-Oxide Ions, What weight percent of CaO should a glass be for 20% of the oxygen ions to be non-bridging, if the glass contains only SiO2 and CaO?
When 1.150 grams of an unknown nonelectrolyte dissolves in 10.0 grams of water, the solution freezes at -2.16°C. What is the molecular weight of the unknown compound? Kf for water = 1.86°C/m.
What are the similarities and differences between a classical harmonic oscillator and a quantum harmonic oscillator?
Prepare a qualitative Born-Haber cycle to explain why only the most electropositive elements form saline hydrides
In the emission spectrum of helium, there are strong lines at wavelengths of 447.1 nm, 501.6 nm, and 587.6 nm. Using the Balmer-Rydberg equation, determine the values of nf for each emission.
Sulfur-38 has an atomic mass of 38.0 and a half life of 2.87 hours. How long will it take for 99.99% of a sample of sulfur-38 to decay
Ethanol (C2H6O), the intoxicant in alcoholic beverages, is also used as a precursor of many other organic compounds. In acid solution, ethanol forms diethyl ether (C4H10O)
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