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Using the Bohr formula for the radius of an electron orbit, estimate the average distance from the nucleus for an electron in the innermost (n = 1) orbit of a cesium atom (Z = 55). (in m)
Approximately how much energy would be required to remove this innermost electron? (in keV)
Sodium saccharin, is a nucleophile, but DMF is not. Explain why
If the flask has a volume of 0.500 L, what is the minimum mass of PH3BCl3(s) that must be added to the flask in order to achieve equilibrium
what is the delta S in J/K*mole when 1.645 grams of methane (FW=16.04) at 0.1091 atm pressure is compressed by a factor of 8.064 at a constant temperature of 22.81
Which of the following is the strongest acid
consider the reaction that describe the haber process for the production of ammonia nh3n2g3h2g lt---gt 2 nh3 g for
Estimate the volume of a solution of 2.3 M NaOH that must be added to adjust the pH from 4.0 to 9.0 in 61 ml of a 68 mM solution of phosphoric acid.
The reaction that was on the screen when you started and its derivative demonstrate that the change in enthalpy for a reaction, Delta H, is an extensive property.
Determine the heat of combustion of Mg as described by the reaction: Mg(s) + 1/2O2(g) → MgO(s).
If an acetic acid/sodium acetate buffer solution is prepared from 100ml of 0.10M acetic acid, what volume of 0.10M sodium acetate must be added to have a pH of 4.00
dry-cleaning solvent (molecular weight = 146.99 g/mol) that contains C, H, and Cl is suspected to be a cancer-causing agent. When a 0.133 g sample was studied by combustion analysis, 0.239 g of CO2 and 0.0323 g of H2O formed. How many moles of eac..
Twenty grams of a solute are added to 100g of water at 25C. the vapor pressure of pure water is 23.76 mmHg, the vapor pressure of the solution is 22.41 torr.
You need to load 10 ug of protein into one of the wells of a gel. This needs to be in 1x buffer and in a total volume of 15 uL. You are given a 10 ug/uL solution of protein, a 5x buffer, and water. How much of each should you mix to load the gel c..
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