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Using the Bohr atomic model, explain to a 10-year old how spectral emission and absorption lines are created and why spectral lines for different chemical elements are unique. (Do not simply describe how the lines are produced experimentally. Use the Bohr model to explain what is going on with the atoms.)
Vapor pressure measurements at several different temperatures are shown below for mercury. Determine graphically the molar heat of vaporization for mercury.
Which of the following is the best choice below for preparation of a .10M buffer solution required to maintain a ph of 3 and WHY. Why aren't others suitable.
Write a balanced net ionic equation to show why the solubility of MgF2(s) increases in the presence of a strong acid and calculate the equilibrium constant for the reaction of this sparingly soluble salt with acid.
They "push off" and travel directly away from each other, the boy with a velocity ofv=0.67m/s to the left.If the boy weighs712Nand the girl weighs 452 N, what is the girl's velocity after they push off? (Consider the ice to be frictionless. Enter ..
Fully explain two disadvantages of the colorimetric method to determine the concentration of species over te classial titration method. using two chemichal reactions explain how iodate ions and ypochlorite ions both act as oxidizing agents
Calculate the Pickering series wavelength associated with the excited state ni = 9.What region of the electromagnetic spectrum does this transition fall in?
Barbital, Ka=1 X 10-8, a weekly acidic sleeping pill is titrated against 0.200 M KOH solution. Explain what is the pH after 10.0mL of KOH has been added to 200.0mL of 0.017 M of Barbital
Determine q for the acid-base reaction, assuming that the liquids have densities of 1.00 g/mL and the same heat capacities as pure water.
question substances a and b are the same mass and at the same initial temperature. when they are heated the final
A mixture of gases containing 21.0 g of N2, 106.5 g of Cl2, and 12.0 g of He at 14 oC is in a 50.0 L container. What is the partial pressure of N2?
Balance the following net ionic equation. Use H+ rather than H3O+. What is the sum of the coefficients? (Do not forget coefficients of one.) I- + NO2- ® NO + I2 (acidic solution)
Imagine that your water heater has broken, but you want to take a bath. You fill your bathtub with 25 kgof room-temperature water (about 25c ). You figure that you can boil water on the stove and pour it into the bath to raise the temperature The ..
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