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The combustion of one mole of ethanol (C2H5OH(I)) to produce carbon dioxide as well as gaseous water has Hr= -1235 kJ mol-1 at 298 K. Explain what is the change in internal energy for the reaction?
What is Nitroglycerin's molar mass if the addition of 0.454 g of nitroglycerin to 100.0 g of benzene changes the solution's vapor pressure to 94.85 mm Hg?
Draw the substitution products from the reaction of (R)-2-chloro-2-iodopentane with ethanol in the Fisher projection with the lowest priority group on a vertical bond
A sample of iron was dissolved iin hydrochloric acid. The liberated hydrogen was collected by displacement of water. The hydrogen occupied 262 mL at 26 c.
inorganic synthesis preparation of sodium thiosulphate1 how would you determine the degree of purity of the sample2
An aqueous solution of an unknown ruthenium salt is electrolyzed by a current of 2.50 A passing for 50.0 minutes. If 2.618 g Ru is produced at the cathode, what is the charge of the ruthenium ions in solution
How many grams of sodium lactate should be added to 1.00 L of 0.150 M lactic acid to form a buffer solution with pH= 4.00? Assume that no volume change occurs when the sodium lactate is added.
The atomic mass of silicon is 28.0855 amu and the natural abundance of 29Si is 4.68%. What is the natural abundances of 28Si
based on the synthesis chart provided in the organic course noteswhat is the smallest number of synthetic steps needed
When a particular metal is illuminated with photons, one electron is observed for each absorbed photon. What effect would decreasing the wavelength and number of photons, have on the electrons leaving the surface
The Kb value for Hydrazine is 1.3x10^-6. What is the pH of the solution before any HCl has been added
Calculate the volume of 6 M NaOH required to react completely with the amount of methyl salicylate you used. How much of the 6 M NaOH that you used was in excess of the theoretical amount?
Sodium bicarbonate is often used as an antacid to neutralize excess hydrochloric acid in an upset stomach. What mass of hydrochloric acid (in grams) can be neutralized by 2.3g of sodium bicarbonate?
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