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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.
An ultra-high-vacuum pump can reduce the pressure of air from 1.0 atm to 1.0E-12 mmHg. Calculate the number of air molecules in a liter at this pressure and 298k.Compare your results with the number of molecules in 1.0 L at 1.0 atm and 298k. Assum..
Sodium oxalate, Na2C2O4, in solution is oxidized to CO2 by MnO4- which is reduced to Mn2+. A 50.1 volume of a solution of MnO4- is required to titrate a 0.339 g sample of sodium oxalate.
A 0.204-g sample of a CO3^2- antacid is dissolved with 25.0 mL of 0.0981 M HCl. The hydrochloric acid that is not neutralized by the antacid is titrated to a bromophenol blue endpoint with 5.83 mL of 0.104 NaOH.
If 6.00mL of 0.1000 M NaOH solution is required to just neutralize excess acid after 20.00mL of 0.1000 M HCl was added to 1.00 g of an antacid, define how many moles of acid can the antacid counteract per gram
the boiling point of a solution containing 10.44 g of an unknown nonelectrolyte in 50.00 g of acetic acid is 159.2degc.
If each of the following mixtures were analyzed by thin-layer chromatography, which substance would have the largest Rf? The smallest Rf? Explain.
The heat of vaporization of butane (C4H10) is 21.0 kj/mol. What is the change in entropy when 55.g of butane boils at -.05 degrees Celcius.
Determine the point group of each of the three possible geometries of the hypothetical Be3+ on, ten draw the molecular orbitals for each geometry,
boron has two naturally occurring isotopes 10b 19.9 and 11b 80.1. although the b2 molecule does not exist naturally on
a 14.0 g sample of cacl2 is dissolved in 121 g of water with both substances at 25.0degc. calculate the final
Calculate the expansion work done against a constant external pressure of 0.999 atm and at a constant temperature of 24°C. Assume that the initial volume of dry ice is negligible and that CO2 behaves like an ideal gas.
Acyl chloride can hydrolyze in water spontaneously to carboxylic acid. In the interfacial polymerization water is used as one of the solvent, why you don't have to worry about the hydrolysis of sebacoyl chloride in this action
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