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Why do you suppose that, at high temperatures, a molecule of water vapor (H2O) has three rotational degrees of freedom and a molecule of nitrogen gas (N2) has only two?
Estimate the minimum boiling point difference betwen two compounds that would allow effective seprartion of the two compounds by simple distillation.
What is the minimum quantity of atmospheric oxygen required to completely convert 0.30 moles of propan-1-ol into carbon dioxide and water
A certain first-order reaction has a rate constant of 2.30×10-2 s^-1 at 23 C. What is the value of k at 55 C if Ea= 84.0 kj/mol
The heat of vaporization of water is 40.66 kJ/mol. Assuming sweat is 100% water, how much heat is removed from your body through the evaporation of 3.13 g of sweat?
A 1.95 g sample of potassium bicarbonate is decomposed by heating. If the resulting potassium carbonate weighs 1.54 g and the calculated yield is 1.35 g, what is the percent yield
The introduction state that often the rate doubles for each temperature increase of 10degree celcius. What value of the activation energy would cause the rate to double between 25~35degree celcius? ((k value)
If 38.6 grams of hydrogen sulfide gas (H2S; MM = 34.08 g/mol) react with 36.3 grams of oxygen gas (O2, MM = 32.00 g/mol), what is the mass of sulfur dioxide (SO2, MM = 64.06 g/mol) gas produced
how many possible trisubstituted derivatives c6h3x2y can be obtained from the meta disubstituted benzene c6h4x2? (ignore directive effects of the substituents x and assume that all positions on the ring are accessible to the reagent y+).
Problem- A solution is made of 50mL of 0.01 Pb(NO3)2 and 40mL of 1M KCI. What are the equilibrium concentrations of Pb2+ and Cl- if Ksp of PbCl2= 1.6x10^-5? use an ICE table to show how it dissociates as in a common ion problem
an unknown solution contains only two absorbing species thymol blue and methylthymol blue. this sample had absorbance
Write the balanced chemical equation using the lowest possible whole number coefficients for Fe2O3+2Al = 2Fe+Al2O3.
A 2.00 g sample of silver (Ag) was heated with excess sulfur (S) to produce 2.30 g of a "silver sulfide". Calculate the empirical formula of this sulfide, AgxSy, where x and y are the smallest whole-number moles of Ag and S, respectively. (remembe..
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