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When 10.0 mL of a 2.0 M acetic acid solution at 20.6ºC is reacted with 10.0 mL of a 2.1 M NaOH solution at 21.0ºC in a coffee cup calorimeter, the resulting temperature of the solution was determined to be 28.6ºC. Calculate the heat of reaction for this acid-base neutralization. Assume the density and heat capacity of the solution to be the same as water. (d=1.00 g/mL and Cp=4.184J/gºC) The calorimeter constant was 2.7 J/ºC
occurring at 800 K and 1atm. The initial mixture contains 1 mol of SO2 and 0.5 mol of O2. The reaction mixture can be considered to be an ideal gas.
What is the concentration of the compound in a solution whose absorbance at 219 nm is A = 0.080 with a sample pathlength of 1.00 cm
When an aqueous solution that is 1M each in HCl, ZnCl2, and CoBr2 is electrolyzed, the elemental products formed initially at the cathode and anode are, respectively
NaCl is an electrolyte that commonly used to melt ice by lowering its melting point. what is the lowest possible melting point for ice that could be obtained considering the solubility of NaCl in water? The Kf for H2O is 1-86 degree C/m.
An open end manometer constructed from a U-shaped tube was operated using an oil which has a density of 1.088 g ml-1. In a particular measurement, the level in the end connected to the gas manifold, on which the experiment was being conducted,
A cubic meter of air was sampled at 1.0 atm and 25 C and was found to contain 29.0 micrograms of S02. How many pub of SO2 is in that air?
Explain what is the molar concentration of HC2H3O2 in vinegar. Define what is the amount in grams of vinegar that was titrated. Define what was the amount in grams of NaOH
in a strongly acidic solution the amino acid lysine esists as the dication. as the pH is raised, what monocation is formed by the loss of a proton form the dication?
A zero-order reaction has a constant rate of 1.60×10-4 . If after 35.0 seconds the concentration has dropped to 2.50×10-2 , what was the initial concentration?
The B4O5(OH)4^2- ion, present in 5.0 ml of a saturated Na2B4O5(OH)4 solution at a measured temperature, is titrated to the bromocresol green endpoint with 6.51 mL of 0.146 m HCl. How many oles of B4O5(OH)4^2- are present in the sample
Choose the correct equation for the standard enthalpy of formation of CO(g), where change Hf for CO= -110.5kJ/mol? (gr indicates graphite)
How much of each of the following substances would you add to water to prepare 1.50 L of a 0.90 M solution? NiCl2 from the salt NiCl2·6 H2O
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