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If 1.0 μg/ml of pigment X shows an absorbance of 0.059 at 370 nm, then what is the concentration of a solution of pigment X that shows an absorbance of 0.443 at 370 nm? (Assume linearity.)
Titration of a Weak Acid with a Strong Base, Find the pH before, at, and after equivalence point of 35 ml of 0.15 M lactic acid with 0.18 M NaOH.
Acetone, like dimethyl ether, has no self-hydrogen bonding capacity, but its dipole moemnt is more than double that of the ether. Can this high dipole moment explain the properties of acetone compared to the other compounds
0.134 mole of KCl and 0.185 mole of CaCl2 were dissolved in water. calculate the total number of moles of Cl- ions in the solution.
The half-equivalence point of a titration occurs half way to the end point, where half of the analyte has reacted to form its conjugate, and the other half still remains unreacted. If 0.560 moles of a monoprotic weak acid
What are the linear and volume flow rates. (b) What is the capacity factor, k', and the partition coefficient, Cs/Cm, for this solute. (c) What fraction of time did the solute spend in the stationary phase
The atomic mass of element X is 33.42 amu. A 15.05-g sample of X combines with 79.32 g of another element Y to form a compound XY. Calculate the atomic mass of Y.
12.0 moles of gas are in a 7.00L tank at 25 degrees Celsius. Calculate the difference in pressure between methane and an ideal gas under these conditions. The van der Waals constants for methane are a= 2.300L^2 and b=.0430mol.
The BF3 molecule has one A'1, one A"2 and tow E' vibrations. Does this representation account for all of the normal mode fundamental vibrations for this molecule
Write the electron configuration of selenium. List the following compounds in order of increasing lattice energy: NaCl, NaBr, MgO, CaO.
The solubility of benzoic acid at 0oC is 1.7g/L and at 90oC is 45.5g/L. How much water do you need to dissolve 0.455 g of benzoic acid at 90oC. How much of the original benzoic acid will remain in the solution once the temperature is reduced to 0o..
A buffer is initially 0.180M in 4-nitrophenol (HC6H4NO3) and 0.200M in potassium 4-nitrophenolate (KC6H4NO3). The Ka of 4-nitrophenol is 3.8*10^-4 and the buffer has a pOH = 3.47. If 0.20g on NaOH were added to 100ml of this buffer what would the ..
commercial vinegar was tritrated with naoh solution to determine the content of acetic acid hc2h3o2. for 20.0
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