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A 25.00 mL aliquot of iron solution was titrated to equivalence with 26.19 mL of 0.0215 M KMnO4. A procedure similar to the one in experiment 7 was followed. Calculate the moles of iron in the origi
Calculate the microwave energy in Joule per photon and in Joule per mole of photon (J/mol). (b) How many moles of microwave photon must be absorbed by 1.0 g of water to raise its temperature by 1.0
Calculate the weight of benzene codistilled with each gram of water and the percentage composition of the vapor produced during a steam distillation. The boiling point of the mixture is 69.4°C i
A solution is 2.25% by weight NaHCO3. How many grams of NaHCO3 are in 250.0 g of solution
What happens if the flow of solvent through a column is too fast? What happens if the rate of flow is too low or if the flow is stopped for a period of time (by closing the stopcock?)
In the spinach extraction, indicate which of the following solvents may or may not be suitable as a replacement for the hexane used in the experiment: acetone, diethyl ether, ethanol. Briefly explai
Name some factors, besides weight and cost effectiveness, that one might consider when choosing one brand of antacid over another. Explain.
If what make an acid strong is the extent of dissociation, at what sorts of concentrations (high or low) do weak acids behave more like strong acids
A solution consists of 10g of liquid X (MW:50) and 9g of liquid Y (MW:30). The vapor pressures of pure X and Y are 40 and 70 mmHg, respectively, at 20°C. What are Nx and Ny (N = mole fraction)?
A laser pulse with a wavelength of 532 nm contains 3.85 mJ (milliJoule) of energy. (a) Calculate the frequency and energy per photon of the laser light. (b) How many photons are in the laser pulse?
Write the net ionic equation for the interaction of an ion with water. Explain why the salt solution is acidic, basic or neutral? NaC2H3O2 Na+ + H2O -> and C2H3O2 + H2O ->
Calculate the average cost of antacid tablet that would be needed to neutralize 1.00 mole of HCl. (Cost Effectiveness) 3. The HCl concentration in a hyperacidic stomach is 0.03M. The volume of liqui
what is the minimum concentration of ammonia that should dissolve AgBr to produce a 0.01 M Ag(NH3)2+ solution?
A quantity of 18.68 ml of a KOH solution is needed to neutralize 0.4218g of a KHP what is the concentration of the KOH solution
Draw the organic product of the following reaction between (1S,3S)-1-chloro-3-methylcyclopentane and methanethiol in the presence of sodium hydroxide.
For a particle in a box system, by what factor do you need to change the box length to decrease the transition energy by a factor 5 for a fixed value of mass
Why does bromine add faster to a disubstituted double bond than a monosubstituted double bond to produce dibromides
If one reacts bromine in water with a double bond a vicinal halohydrin is formed. Provide an explanation for this result and show a mechanism for the reaction of cyclohexene with bromine in water.
Ionization involves completely removing an electron from an atom. What wavelength of light contains enough energy in a single photon to ionize a hydrogen atom
Suppose that the silver-silver chloride electrode in the figure is replaced by a saturated calomel electrode. Calculate the cell voltage if [Fe2+]/[Fe3+] = 5.0 10-3. V
An electron in the n = 7 level of the hydrogen atom relaxes to a lower energy level, emitting light of 93.1 nm. What is the value of n for the level to which the electron relaxed
If the molar solubility of Cd3(PO4)2 at 25 oC is 1.19e-07 mol/L, what is the Ksp of Cd3(PO4)2 at this temperature
Magnesium carbonate, MgCO3, has a Ksp value of 6.80×10?6 . What happens when magnesium and carbonate solutions are mixed to give 2.50×10?3M Mg2+ and 2.00×10?3M CO3 2-?
A 6.55 g sample of aniline (C6H5NH2) was combusted in a bomb calorimeter. If the temperature rose from 22.25 ? C to 55.15 ? C, use the information below to determine the heat capacity of the calorim