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A TLC plate showed two spots with Rf values of 0.25 and 0.26. The plate was removed from the developing chamber, the residual solvent was allowed to evaporate from the plate, and then the plate was returned to the developing chamber. What would you expect to see after the second development was complete?
Which compound remains in the ether and which compound moves to the aqueous NaOH? Provide the chemical reaction that occurred when NaOH was added. Show all lone pair electrons and formal charges. Clearly indicate the difference between an ionic bo..
Calculate the amount of heat required to heat a 3.5 kg gold bar from 21 degrees celsius to 67 degrees celcius.
Water molecules can undergo a self-ionization reaction to produce very small concentrations of hydronium and hydroxide ions
An unknown gas is held in 2 separate containers with identical number of moles of gas. The volume of container 2 is 0.347 L and has a pressure of 0.315 atm. The volume of container 1 is 1.145 L. What is the pressure of the unknown gas in container..
A 1.375g sample of mannitol. a sugar found in seaweed. is burned completely in oxygen to give 1.993 g of carbon dioxide and 0.9519 g of water. Find the empirical formula of mannitol
What is the change in average specific (kJ/kg) enthalpy of this system if the quality increases by 0.71 at a constant pressure of 10 bar?
Calculate the conditional formation constant Kf for the formation of an EDTA complex with copper
When drawing the lewis structure of TeCl4, WHY does Te have a lone pair. It's already connected to four Cl atoms and has 8 electrons.
The concentration of NaCl in solution is 0.25 M. What volume of solution contains 5.0 g NaCl.
What is the rate constant of a first-order reaction that takes 8.50 minutes for the reactant concentration to drop to half of its initial value?
If you are given sodium acetate and asked to make a .5 M acetate buffer at pH 4.75, will you have to add acid, base, or nothing in order to achieve the proper pH? What is the approximate pH after adding the sodium acetate?
what mass of sucrose should be combined with 478 of water to make a solution with an osmotic pressure of 8.60 at 320 ?
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