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Find delta H for the combustion of ethanol (C2H6O) to carbon dioxide and liquid water from the following data. The heat capacity of the bomb calorimeter is 34.65 kJ/K and the combustion of 1.765 g of ethanol raises the temperature of the calorimeter from 294.33 K to 295.84 K.
The solubility of calcium sulfate is 0.67 g/L. Show the calculation of the Ksp for calcium sulfate (all steps including chemical equilibria must be correct for full credit)
The measured boiling point of the solution was 65.46 °C. Calculate the molecular weight of the unknown substance.
NH3 solution is titrated by HCl solution, what is the pH at the 3/4 point of the titration? Kb(NH3)=1.8*10^-5
Which of the following reactions is (are) oxidation-reduction reactions? Explain your answer briefly.
55.0 calories of heat are added to a small lead block. If the temperature of the lead increases from 27.0°C to 59.2°C, what must be the mass of the lead block?
What is the wavelength of a photon of electromagnetic radiation having a photon energy of 4.56X10^-19 J? Report your answer in nanometers, to the correct number of significant figures.
which is more difficult removing the valence electron from potassium or removing the valence electron from sodium
For each reaction between a ketone and an amine, draw the curved arrow(s) to show the first step of the mechanism, then draw the final organic product
Assuming that the probability distribution is Gaussian, what is the probability (in %) that you will weigh out >47% more AgCl than the expected average amount
Explain which of the following species has the shortest, strongest covalent bond: CN^- , CO2 , C2^2- , CO^2- , CO
if 0.176 moles of mg have combined with 0.220 moles of o what is the empirical formula of the
name and outline the concept which is introduced when more than one valid lewis structure can be drawn for a given
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