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What happens to isotopes that are unstable? How may these natural processes be used by chemists to make measurements in the environmental fields?
The smallest atoms can themselves exhibit quantum mechanical behavior. Calculate the de Broglie wavelength (in pm) of a hydrogen atom traveling 475 m/s
Does anybody know what is the simplest way to irradiate a very small amount chemical solution? I have read some research papers, and there was a method that used polystrene tissue culture plastic wells
Calculate the mass of FeS formed when 9.42 g of Fe reacts with 8.50 g of S. Hydroxylamine nitrate contains 29.17 mass % N, 4.20 mass % H, and 66.63 mass % O. Determine its empirical formula.
a coffee cup calorimeter containing 100 ml of h2o is used. the initial temeperature of the calorimeter is 23c. if 2.40
Find emperical formula 0.25 mal of Iron atoms combined with 0.33 mal of O atoms. Find emperical formula
What is the molarity of a solution produced by dissolving 31 g of Cu(NO3)2 in a 100 mL volumetric flask?(Enter unit as M.)
Sketch a phase diagram for benzene and locate these points: the triple point (5.5 0C and 3.4 mmHg), the normal boiling point (80.10C)
Forty miles above the earth's surface, the temperature is 250 K and the pressure is 0.12 mm Hg. What is the density of air at that altitude. Assume the molar mass of air is 28.95 g/mol
Explain the pressure-temperature coexistence line for solid-vapor equilibrium sublimation is for all time less steep in a P versus T plot for a pure material than is the melting line. Define why.
Calculate the molar solubility of Fe(OH)2 in a buffer solution where the pH has been fixed at the indicated values. Ksp = 7.9 x 10-16.
When a 19.7 mL sample of a 0.323 M aqueous hydrofluoric acid solution is titrated with a 0.399 M aqueous potassium hydroxide solution, what is the pH at the midpoint in the titration
Compare the temperature of your water bath at the time of reflux with the boiling point of your solvent
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