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Sulfur 2.56g is burned at a constant volume calorimeter with excessO2 gas. The temperature increases from 21.25C to 26.72C. Thebomb has a heat capacity of 923J/K and the calorimeter contains 815grams of water. Calculate (change in)U per mole of SO2 formed for the reaction
S8(s)+8o2(g) ---> 8SO2(g)
How long would it take to electroplate a metal surface with 0.500 g nickel metal from a solution of Ni 2+ with a current of 4.0 A?
Which of the following substances is more likely to dissolve in liquid CS2. a). Sodium Iodide b). Lithium Iodide c). Iodine d). Potassium iodide
Calculate the pH at the point when no titrant was added and at the end point in the titration of 0.200 M potassium hydrogen maleate (abbreviated as KHM) with 0.200 M sodium hydroxide
The rate of SN2 of tert-butyl bromide is faster in polar aprotic solvents than in polar protic solvents. Why? a. polar aprotic lower the potential energy of the product.
Calculate the solubility of MnOH2 in grams per liter when buffered at pH=7.0 and pH=9.8 and pH=11.6
Chemistry The rate of a first-order reaction is followed by spectroscopy, monitoring the absorption of a colored reactant at 520 nm. The reaction occurs in a 1.09-cm sample cell
A solute with MW = 67.1 g/mol is prepared in an aqueous solution in which the molality is 3.08 m. The solution density is 1.0616 g/cm^3. To simplify the following calculations, assume that the solution contains exactly 1 kg of solvent.
He concluded that electrons are emitted only when intensity of light is increased. He observed a continuous spectrum of light when hydrogen gas was supplied with energy.
Liquid sodium is being considered as an engine coolant. How many grams of liquid sodium (minimum) are needed to absorb 6.10 MJ of energy (in the form of heat)
Sufficient sodium cyanide, NaCN, was added to 0.015 M silver nitrate, AgNO3, to give a sloution that was initially 0.100M in cyanide ion, CN-. What is the concentration of silve ion, Ag+, in this solution after Ag(CN)2- forms
A solution composed of an equal number of moles of acetone and chloroform has a vapor pressure of 250 torr at 35 degrees celsius. (a) what would be the vapor pressure of the solution if it exhibited ideal behavior
The standard entropy of Pb(s) at 298.15k is 64.80 jk-1 mol-1. assume that the heat capacity of Pb(s) is given by Cp,m (Pb,l)/jk-1mol-1 = 32.51 -.00301 t/k. calculate the standard entropy of Pb (l) at 650 C. calculate delta H for the transformation..
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