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Explain what are the similarities between the Rutherford-Bohr atom as well as the modern quantum mechanical model? Explain what are the differences? Define why is the Rutherford-Bohr model still useful? Explain in what situations would you use one model over the other? Why?
Explain what is ionization energy? Explain how is it related to electro negativity? Define what is the pattern for ionization energy in the periodic table? State what is the pattern for electronegavity in the periodic table?
ammonia reacts with oxygen according tot he following equation4nh35o24no6h2o deltahrxn -906kjcalculate the heat in kj
If a gas is placed in a storage tank at pressure of 30.0atm at 20.3 degrees Celsius. As a safety device, a small metal plug in the tank made of a metal alloy that melts at 130 degrees Celsius. If the tank is heated, Explain what is the maximum pre..
Consider the neutral form of the amino acid histidine a) When the neutral form of the amino acid histidine (HA) is titrated with HClO4, write the sequence of reactions that occur. Draw structures of reactants and products.
An aqueous solution containing barium iodide (BaI2) is electrolyzed in a cell containing inert electrodes. The products at the anode and cathode are
In a flame test in the lab, the compound Barium Chloride and Barium nitrate have ions, what are the cations and anions for both.
Calculate the final concentration of a sodium hydroxide solution prepared by adding 10.00mL of 5.325M sodium hydroxide stock solution into a 250.00mL volumetric flask and then filling to the mark with de-ionized water.
What is the molarity of a solution that contains 35.0 g of vitamin B1 hydrochloride (molar mass = 337 g/mol ) in 110 g of solution?
Identify the most stable arrangement of the regions of high electron density. Diagram and name the type of structure that the molecules has based on positions of the atoms.
In the NMR there is a peak at: singlet(1 Hydrogen at 9.5), triplet( 2 hydrogens at 2.5), quintet(2 hydrogens at 2), quintet or sextet( not clear)(4 hydrogens at 1.3), and triplet ( 3 hydrogens at 1).
What ratio [CH3NH3+]/[CH3NH2] is needed to prepare a buffer solution with a pH of 8.60 from methylamine, CH3NH2, and methylammonium chloride, CH3NH3Cl. Kb of CH3NH2 = 3.7 10-4.
A 4.0L sample of air collected at 298 K and then cooled to 278F while held at constant pressure. What is the new volume of the air
How many kilojoules are released when 10.0g of steam condenses at 100 degrees C and cools to 0 degrees C?
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