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Calculate the molarity if 14.5 g of NaOH was dissolved in enough water to give 360 mL of solution.
An electron spin can adopt either of two orientations in a magnetic field, and its energies are ±?BB, where ?B is the Bohr magneton. Deduce an expression for the partition function and mean energy of the electron and sketch the variation of the fu..
Kp for the reaction of SO2(g) with O2 to produce SO3(g) is 3 × 1024 . Calculate Kc for this equilibrium at 25ºC. (The relevant reaction is 2SO2(g) + O2(g) 2SO3(g).)
Calculate the pH at the equivalence point for the titration of 0.25 M CH3COOH with 0.25 M NaOH. (For CH3COOH, Ka= 1.8 × 10^-5)
What is the pH at the point during a titration when 34 mL of 0.200 M HCl has been added to 33 mL of 0.0500 M NH3 solution? HCl is strong acid, Kb = 1.8 × 10-5 for NH3.
the equilibrium mixture is compressed at constant temperature to a volume of 6.21 L? [NH3] = [H2S]=
What mathematical expresssion will yield the correct volume at 177 degrees celsius and 400mgHg?
The reaction between ethyl bromide (C2H5Br) and hydroxide ion in ethyl alcohol at 330 K, C2H5BR(alc) + OH-(alc) --> C2H5OH(l) + Br-(alc), is first order each in ethyl bromide and hydroxide ion.
Calibration and collection of equilibrium data are different experiment. Why could you use the calibration curve for getting equilibrium data?
Which of the following is the best reason as to why the strands of a DNA molecule are more easily separated at pH > 11. A) At pH 11 the cross-strand negative charge repulsion becomes so strong that the two strands are much more easily separated.
Meaning, use and calculation of empirical formulas, In this introduction are given the explanation of how to find out an empirical formula if one has found out the chemical elements of an unknown substance and measured their ratio of masses
For each of the following strong base solutions, determine [OH-], [H3O+], pH and pOH. a) 0.14 M NaOH? b) 1.7x10^-3 M Ca(OH)2? c) 4.5x10^-4 M Sr(OH)2? d) 8.6x10^-5 M KOH
The liquid is allowed to stand in contact with the solid until equilibrium is achieved and then the liquid is poured off. What is the mass of solid remaining?
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