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Calculate the energy of attraction (in eV) between a cation with a valence of +2 and an anion with a valence of -1, the centers of which are separated by a distance of 7.1 nm.
If you weigh .25g of an antacid tablet that weighs 1.42g, what percentage of the tablet have you used? If the tablet contains 250 mg of CaCO3, what mass of CaCO3 do you have in your measured portion
Calculate the boiling point of a 2.97m aqueous solution of ethylene glycol, a nonvolatile nonelectrolyte.
Assuming the volume of the stomach to be 1.0L what will the pH change of the stomach acid resulting from the ingestion of one tums tablet
What percentage of total HF molecules are in each of the first 6 rotational levels (J = 0-5) at 25oC ? Howmany levels (values of J) are required to account for 99% of all HF molecules at this temperature
What is the mole fraction of solute and the molal concentration for an aqueous solution that is 19.0% NaOH by mass?
Water in an enclosed vessel at 17°C contains a concentration of dissolved oxygen of 6 mg/L. At equilibrium, determine the concentration of oxygen in the space above the water in molal fraction. and the total pressure in the vessel. Henry's law con..
Calculate the volume of the NaOH needed to completely neutralize the acid in the flask. Calculate the pH for a) initial acid solution in the flask; b) the point at which 8mL of the base has been added; c) the equivalence point and d) the point in ..
The diameter of a penny is 19mm. the diameter of a Cu atom is 2.6A. How many Cu atoms side by side in a straight line could fit across the diameter of a penny
if 0.200mole of NaOH is added to 1 liter of solution that is 0.100M in aqueous ammonia and 0.200M in ammonium chloride how much does the Ph change.
Radical formed by H-abstraction from diethyl ether. Showing curved arrows to where it goes.
the colors of the solutions are red, yellow, green, and blue. Further experiments reveal that two of teh complex ions are paramagnetic with four unpaired electrons and teh other two are diamagnetic. What can be deduced from this information about ..
On size-exclusion chromatogram you have three peaks (2.9, 3.5, and 4.8 min). Column dead volume is 12 mL, and flow rate 4 ml/min. Are your separation conditions fit for size-exclusion requirements? Explain why.
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