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Arrange the following solvent systems in order of increasing polarity: chloroform, 9:1, and 1:1 cyclohexane-toluene.In which would you expect the highest Rf value for a given compound?
Molecular iodine, I2 (g), dissociates into iodine atoms at 625 K with a first-order rate constant of 0.271 s-1. If you start with 5.2x10^-2 M I2 at this temp.
were used to dissolvethe potassium hydrogen phthalate, would the calculated molarity of the NaOH solution be less, greater or remain the same? Explain
Based on this equation, what is the value of the Rydberg constant (R) in m-1? (5 significant figures)
A certain minimum energy(E min) is required to eject an electron from a photosensitive surface. Any energy obsorbed beyond this minimum gives kinetic energy to the ejected electron.
The freezing point of 3.5 grams of an unknown organic compound in 100 ml of benzene is 5.0 c calculate the molecular weight of the unknown compound.
Determine how many grams of sodium chloride are required to prepare 250. mL of this solution. (if given the density of the saline solution is 1.0 g/mL)?
A 100.0 mL aliquot of a dibasic compound with Kb1= 1*10^-4 and Kb2 = 1*10^-8 was titrated with 1.00 M HCl. Calculate what the pH of the solution would be after 15.0 mL of the acid was added to the 100 mL aliquot base.
A 5ml portion was taken a from a 100ml solution containing a dissolved vitamin tablet . this 5ml solution was diluted to 100ml, next, 10 ml was waken from the diluted solution and further diluted to 100ml, it was determined that this final solutio..
Which has the lower concentration of hydrogen ions, vinegar at pH 3 or tomato juice at pH 4? How many times fewer hydrogen ions? Which is more acidic?
making it an excellent choice as a standard acid. What is the concentration of a NaOH solution, if it takes 62.00 mL to neutralize a 0.0778 g sample of the acid?
Write a balanced net ionic equation for the neutralization reaction and Tartaric acid,( C4H6O6) , has two acidic hydrogens.
How many total moles of ions are released when the following sample dissolves completely in water. 8.47x10^-2g of Ca(NO3)2
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