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How does the Rf value of a given metal ion in solution by itself compare to its Rf value when it is in a mixture with other metals ions? Which is the more important interaction: the metal ion with the solvent system and paper or with the metal ions?
Consider the titration of 50.0 mL of 0.200 M HOCl by 0.200 M KOH for the next five questions (Ka for HOCl = 3.5 x 10-8). Calculate all pH values to two decimal places.
Steam at 3MPa and 300oC exits a boiler and goes into a high pressure turbine in which it is expanded to 300kPa. The steam is then sent back to the boiler (constant pressure heat exchanger) and reheated to 300oC.
If several large air bubbles entered the graduated cylinder filled with water when it was inverted into the water trough, what would the effect be on a plot of volume H2(g) vs. mass Mg?
In the formula for sodium phosphate (Na3PO4) how many moles of sodium are represented? How many moles of phosphorus? how many moles of oxygen?
Using the molecular orbital model, write electron configuration for the following diatomic species and calculate the bond orders. Which ones are paramagnetic
What characteristic absorption bands would you expect to find in the infrared spectrum of caffeine?
A mixture of CaCO3 and CaO weighing 0.705 g was heated to produce gaseous CO2. After heating, the remaining solid weighed 0.474 g.
What mass of NaOH can this buffer neutralize before the pH rises above 4.00?
Calculate the energy of attraction (in eV) between a cation with a valence of +2 and an anion with a valence of -3,
DNA double helix has the sequence GATCGATTAC, what is the sequence of the other DNA strand?
A gas mixture with a total pressure of 750 contains each of the following gases at the indicated partial pressures: , 253 ; , 120 ; and , 173 . The mixture also contains helium gas.
Explain the following observations. 1. Aziridines, compounds that contain nitrogen in a three-membered ring, undergo pyramidal inversion much more slowly than do other alkylamines
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