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Question - The half life of a first order reaction is 1.5 hours. How much time is needed for 94% of the reactant to change to product?
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a gas occupies a volume of 458 mL at a pressure of 1.01kPa abd temperature of 295 K. When the pressure is changed, the colume becomes 477 mL. If there had been no change in temperature, what is the new pressure?
a solution of ethanol c2h5oh in water is prepared by dissolving 62.0 ml of ethanol density 0.79 gcm3 in enough water
Later in the semester a synthesis reaction will be performed in which a mixture of 2-methyl-1-butene and 2-methyl-2-butene form. GC analysis will be used to determine the relative amount of each product, both of which will be assumed to have the s..
The element silicon has 3 isotopes with the masses and natural abundances shown in the table. Mass of Isotope Natural abundance 27.97693 92.23 28.97649 4.67 29.97376 3.10 What is the average atomic mass of silicon
gives a straight line with a slope equal to -5100 K. What is the activation energy for the reaction?
0.33g of koh is dissolved in 350.0ml of ethanol and 1.45g of c2h5i is dissolved in 350.0ml of ethanol. assuming the
Which type of compound(s) can qualify to be used as possible monomers in condensation polymer formation
A solution is prepared by mixing 50.0 mL of 0.20 M Pb(NO3)2 with 50.0 mL of 1.5 M KCl. Calculate the concentrations of Pb2+ and Cl - at equilibrium. [Ksp for PbCl2(s) is 1.6 10-5.]
Neither serine nor leucine are eluted from the column because the pH of the elution buffer is too high. D. Leucine will elute first, followed by serine. E. Serine will elute first, followed by leucine.
If the reaction mixture initially contains only O2(g) and F2(g), then at equilibrium, the reaction mixture will consist of essentially only OF2(g).
Sulfurous acid, H2SO3, is a weak diprotic acid (pKa,1=1.89 and pKa2 =(7.21 at 25oC). What is the pH of 0.121 mol/L H2SO3(aq) at 25oC?
Determine the wavelength (in nm) of the photon required to ionize one atom of cesium (IE1 = 376 kJ/mol). With what region of the electromagnetic spectrum does this photon correspond (infrared, visible, or ultraviolet)
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