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Use the bohr model to calculate the wavelength of the light emitted when the electron in a hydrogen atom falls from the = 5 shell to the = 3 shell
What is the freezing point of an aqueous 2.65 m calcium chloride (CaCl2) solution? The freezing point of pure water is 0.0ºC and Kf of pure water is -1.86ºC/m.
HClO is a weak acid (Ka = 4.0 × 10-8) and so the salt NaClO acts as a weak base.
Calculate the change in entropy (deltaS) when one mole of diamond is heated from a temperature of 0 K to 400 K at a constant pressure of 1 bar. The temperature-dependent heat capacity of diamond is Cv
solution containing the iron(II) thiocyanate complex is 0.45, Then calculate the mile per liter concentration of the complex
A volume of 80.0 ml of H2O is initially at room temperature (22.0 C). A chilled steel rod at 2.00 C is placed in the water. If the final temperature of the system is 21.1 C , what is the mass of the steel bar?
Choose the answer in which the two atoms are listed in order of increasing ionization energy (smallest ionization energy listed first).
When given a problem with an aqueous solution containing Na3PO4 and you need to find the boiling point of the solution only knowing the solution is 18.7% by mass Na3PO4 and the Kb for water is .512 It also says to consider if the solute is an elec..
What are the absolute and percent uncertainties in the perimeter, area and volume of the tetrahedron?
Write a net ionic equation to explain why the pH didn't go up to about 10, as it would have if that amount of NaOH were added to distilled water or to 20ml 0.00040 M HCL, which also would have a pH of 3.40
The student is supposed to observe the bacterium and make a drawing. However, the student, having just learned about the Heisenberg uncertainty principle in physics class, complains that she cannot make the drawing.
Barium sulfate, BaSO4, is used in medical imaging of the GI tract because it is opaque to X rays. A barium sulfate solution, sometimes called a cocktail, is ingested by the patient
Calculate the mass of NaHCO3 that was used up in the reaction for each beaker. The molecular weight of NaHCO3 is 84.007 g/mole.
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