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Consider the hydrogen atom line spectrum for transitions in the infrared region of the electromagnetic spectrum. The line corresponding to wavelength 1.28μm corresponds to the electron transition from n=5 to what level?
A student wanted to determine the molar concentration of acetic acid in a commercial vinegar sample. He used a volumetric pipet to deliver 3.00 mL of vinegar to an Erlenmeyer flask, added about 30 mL orf water and 3 drops of phenolphthalein indica..
Potassium metal reacts violently when added to water according to the balanced equation: 2K(s) + 2 H2O (I) > 2KOH(aq) + H2(g). How many moles of H2O are needed to react completely with 7.54 mol of K
A 50.0 mL sample containing Ni+2 was treated with 25.0 mL of .050 M EDTA to complex all of the Ni+2 and leave some excess EDTA in solution. the excess EDTA was then titrated with .050 M Zn+2, requiring 5.00 mL to reach equivalence point
container Ais filled with air at STP, it is then inserted into a large enclosed container B, which is then flushed with H2(g), what will happen to the pessure inside container A? explain your answer.
what is the free zn2 concentration if 0.020 m zn2 solution is mixed with an equal volume of 2.0 m nh3? kf for znnh342
The limiting reactant is determined
Calculate the molarity of 736 mL of a solution that contains 153 g of sucrose C12H22O11.
Draw a complete mechanism for the reaction that occurs in this solvolysis experiment showing all the intermediates and using curvy arrows to show electron movement
In a liquid-liquid extraction with water as well as ethyl acetate which phase would you expect each compound below to be dissolved in?
An electron in the hydrogen atom makes a transition from an energy state of principal quantum number ni to the n2 state. If the photon emitted has a wavelength of 487 nm, what is the value of ni
Suggest a reason that TLC plates that are stored in a highly humid room result in different Rf values than plates that are stored in a dehumidified enviorment. Consider the structure of the layered material on the TLC plates and how that material ..
what is the change of enthalpy in condensing 15.0 g of water at 100 degrees C at constant pressure.
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