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In elemental analysis combustion is used to analyze for C, H and N content by weight. To analyze for halogen content a variation of the following experiemnt can be used. Exactly 15.05 mg of an unknown akyl halide (Containing only C,H and I) was dissolved in ethanol and carefully tirtrated with 5.0mM solution of AgNO3 in ethanol. After consuming 14.2 mL of AgNO3 solution, the silver halide precipiate was filtered and amounted to 16.66mg. Based on this alone, deduce a likely formula for the unknown alkyl halide and suggest a structure for it
A 12.5% by mass solution of sodium chloride (NaCl) in water has a density of 1.115 g/mL at 20 degrees C. What is the molarity of this solution
Isooctane is a standard for gasoline octane rating. A sample weighing .5992 g was found to contain .5040 g of carbon and .09515 g of hydrogen. Its molecular mass is 114. Write the empirical and molecular formulas of issooctane(arranging the symbol..
If 4.49 g NaNO3 is dissolved in enough water to make 250 mL of solution, what is the molarity of the sodium nitrate solution
How much of the RNA standard and TE buffer would you add in each well to give the appropriate final concentration with a final volume of 280 µL
when a 1421 J of heat energy is added to 39.5 g of hexane, C6H14, the temperature increases by 15.9 degree centegrade. Calculate the molar heat capacity
The ester ethyl p-nitrobenzoate is more reactive towards nucleophilic acyl substitution than ethyl p-methyoxybenzoate.
Explain why it is preferable to take the geometric mean rather than the arithmetic mean when defining mean activity
Explain why caffeine can be extracted from tea leaves into hot water, and how you extracted the aqueous solution and isolated crude caffeine
Calculate the molar solubility of copper(II) sulfide in each liquid or solution. (See the table.) (a) pure water M (b) 0.43 M CuCl2 M (c) 0.17 M K2S M
determine both the position and velocity (momentum) of an atom or subatomic particle such as an electron and thus negate the uncertainty principle? Fully explain your answer.
1.2 mol of helium is mixed with 2.3 mol of argon in a volume of 1.0L and a temperature of 25.0C. Assuming that helium and argon are perfect gases, what is the pressure of the mixture
what is the pH of a solution prepared by mixing 25 mL of 0.10 M methylamine with 25 mL of 0.10 M methylammonium chloride?assume that the volume of the solutions are additive and that Kb = 3.7 x 10^-4 for methylamine
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