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Obviously occurring element X exists in three isotopic forms: X-28 (27.977 amu, 92.21% abundance), X-29 (28.976 amu, 4.70% abundance), and X-30 (29.974 amu, 3.09% abundance). Compute the atomic weight of X.
What is the pH of a 25.00 mL solution of 0.10 M CH3CO2H? What are the concentrations of OH- and CH3CO2? Ka = 1.8 x 10^-5
How much does the molar enthalpy change when 147 g. of water cools from 90.0 C to 17.0 C when 20.0 g. of KCL is added to the water? Is this reaction exothermic or endothermic?
the molar heat capacity of a gas at constant pressure is 18.7j mol-1 k-1. what is the heat capacity of 9.4 moles of
Find the Fourier transform of the function exp(-πx2/ σ2). Explain how the width and height of the bands are inversely related in the two domains. Why should this be so
Calculate the solubility of copper (II) iodate in 0.56 M copper (II) nitrate. Ksp* is 7.4x10-8 M3.
calculate the initial velocity of a reaction in terms of v max if the substrate concentration is 12 the km. show the
a certain anesthetic contains 64.9 percent carbon 13.5 percent hydrogen and 21.6 oxygen by mass. determine the
At 800K the equlibrium constant, Kp for the following reaction is 3.2 *10^-7. 2H2S(g) 2H2(g)+S2(g). A reaction vessel at 800 K initially contains 3.00 atm of H2S. If the reaction is allowed to equilibrate, what is the equlibrium pressure of S2
How many theoretical plates does the column have? What is the plate height (in mm) of the column if the column is 11.7 cm long?
Acid Mixture Problem, From a full 50-liter container of a 40% concentration of acid, x liters is removed and replaced with a 100% acid.
Calculate the de Broglie wavelength associated with a muon traveling at a velocity of 3.45 104 cm/s.
four values of the normality for a naoh solution were found to be0.09987 n 0.09980 n 0.09882 n and 0.09981 n.a. round
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