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An electron traveling at 2.5×105m/s has an uncertainty in its velocity of 1.18×105m/s .
What is the uncertainty in its position?Express your answer with the appropriate units.
A first order chemical reaction has a rate constant of 5.8×104 s-1 at 10 °C and a rate constant of 4.7×105 s-1 at 64 °C. Calculate the activation energy, Ea, for the reaction.
question you are given a sample of metal and asked to determine its specific heat. you weigh the sample and fid that
When X rays of wavelength 0.096 nm are diffracted by a metallic crystal, the angle of first-order diffraction (n = 1) is measured to be 15.2°. What is the distance between the layers of atoms responsible for the diffraction?
The diluted reference is placed in a cell with a 1.00-cm light path. You then take 35.0 mL of the well water, treat with HNO3 and excess KSCN, and dilute to 100.0 mL. This diluted sample is placed in a variable pathlength cell. The absorbance of t..
Calculate the degree of dissociation (he fraction of molecules dissociated) for the acid in this solution. (You may assume that the mean ionic activity coefficient has a value of 1). (c) From the degree of dissociation, determine the acidity const..
a. determine the electron-domain geometry of osf4b. draw two possible molecular geometries for the molecule based on
Determine the freezing point of a solution that contains 62.8 g of urea (CH4N2O) dissolved in 275 g of water (Kf = 1.85 degree C/m)
The amino acid L-histidine has three acid-base equilibria, with pKa values of 1.78, 5.97, and 8.97. Plot the fraction of solute species present in solution in the pH range 0 to 14.
At what temperature would the population of the first rotational level of HCl be 1/e times the population of the ground state? Rotational constant for HCl, B, is equal to 10.59 cm-1.
Write an equation that represents the reaction of 2% ethanolic PBP solution with 4-methylcyclohexane, and name the product
Normally the alkaline earth carbonates (MCO3; M = Mg^2+, Ca^+2, Sr^+2, Ba+2) are insoluble in water. Why would the method used in this experiment work for calculating the molar mass of the alkaline earth? How would the calculations have to be cha..
What is the pH of this buffer? pH = (b) What is the pH of the buffer after the addition of 0.56 mol of NaOH? (assume no volume change) pH = (c) What is the pH of the original buffer after the addition of 0.30 mol of HI? (assume no volume change) p..
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