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A solution is prepared with 3.85 g of an unknown compound in 100.0 g cyclohexane. The solution had a freezing point of 4.18 deg C. What is the molecular formula of the unknown compound?
We are unable to detect iron via atomic spectroscopy. The problem is we have added Fe-EDTA in a formulation. For detection of Fe, we digest the formulation (sample) with H2SO4 (usual practice) but we are unable to detect Fe by atomic spectroscopy.
the freezing point of the resulting solution is 3.77*C. The freezing point of pure benzine is 5.48*C. Calculate the molar mass of the compound.
On the basis of the solubility rules, write a balanced molecular equation for the precipitation reactions that take place when the following aqueous solutions are mixed. If no precipitation reaction is likely for the reactants given
The density of octane is 0.703 g/mL. What mass (in g) will a 0.996 gallon sample of octane have
If a current of 40 mu A (40x10-6A) is drawn from a solar cell for 6 months, how many faradays are involved
As part of a soil analysis on a plot of land, you want to determine the ammonium content using gravimetric analysis with sodium tetraphenylborate, Na B(C6H5)4-. Unfortunately, the amount of potassium, which also precipitates with sodium tetrapheny..
in a certain experiement 4.6 g al is reacted with excess oxygen and 6.8 g of product is obtained according to this
A typical frequency used by GSM cell phones is 611.0 MHz. What is the wavelength of this signal
What is the pressure of a 10g sample of sulfur trioxide in atmospheres at a temperature of 20 degrees Celsius that has a volume of 50L
Illustrate with a net ionic equation for each of the following how the pH would increase, decrease, or stay the same with the indicated changes: (b) Adding ammonium nitrate to a solution of ammonium hydroxide
For the reaction: PbCl2(s) ? Pb2+(aq)+2Cl1-(aq), what is Q* when 3.9 mL of 0.080 M lead nitrate is added to 13 mL of 0.020 M sodium chloride? Ksp of lead chloride is 1.6 x 10-5 M3.
Calculate the change in entropy (in J/K) when 89.8 g of nitrogen gas is heated at a constant pressure of 1.50 atm
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