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Problem- 1) The dimensions of aluminum foil in a box for sale in supermarkets are 66 yards by 12 inches. The mass of the foil is 0.83 kg. If its density is 2.70 g/cm3, then what is the thickness of the foil in inches?
2) When the release of energy from an excited state to the ground state of electron follows that nFINAL is always equal to 3. Determine the frequency (in Hz) and wavelength (in angstrom) of electromagnetic radiation emitted if the excited electron is coming from an initial=6. Is the electromagnetic radiation released a visible light?
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The solubility of slaked lime, Ca(OH)2, in water is 0.185 g/100 mL. What volume of 0.00200 M HCl is needed to neutralize 12.5 mL of a saturated Ca(OH)2 solution
Suppose an unknown hydrate, AC*XH2O, has a mass of 1.555g before heating, and a mass of .994g after heating, Define what is the experimental percentage of water in the hydrate
A student carried out the synthesis of aspirin starting with 3.48g of salicylic acid. After carrying out the reaction, recrystallizing and then drying the product, the student obtained 3.30g of aspirin. Calculate the student's percent yield.
Calculate the [H+] and pH of a solution made by mixing 30.00mL of 0.238 M CH3COOH with 30.00mL of 0.250 M CH3COONa. (Ka for acetic acid = 1.8x10^-5)
Problem- Predict the organic product formed when BzCl reacts with isopropyl alcohol. BzCl = benzoyl chloride.
A sample of an unknown gas effuses in 10.9 min. An equal volume of H2 in the same apparatus at the same temperature and pressure effuses in 2.35 min. What is the molar mass of the unknown gas
Question- Ramsay calculated atomic weights from the densities he measured. Given the density of argon to be 1.78 g/liter at 273.15 K and standard pressure, calculate its atomic weight.
Consider a particle of mass, m, moving in a one dimensional system between x=a and x=b. Its potential energy is (1+(hbars)^2)/(mx^2). calculate the average value of x and x^2 for the particle in this system
Presume carry out a TLC separation of acetaminophen as well as phenacetin on silica gel using a non-polar developing solvent. Explain which should have the higher R1 value and why
Compound A has the molecular formula C14H25Br as well as was obtained by reaction of sodium acetylide with 1, 12-dibromododecane. On treatment of compound A with sodium amide, it was converted to compound B (C14H24). Ozonolysis of compound B gave ..
What would the appropriate substrate concentration be? b) At what substrate concentration would you expect 30% of the enzyme molecules to have substrate bound?
Give the titration curve for the reaction of C5H5N with HCl. The known solution is the acid, and the base is added to the acid.
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