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Question- If core electrons completely shielded valence electrons from nuclear charge (i.e., if each core electron reduced nuclear charge by 1 unit) and if valence electrons did not shield one another from nuclear charge at all, what would be the effective nuclear charge experienced by the valence electrons of the following atoms?
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The energy that can be supplied by ingestion of each compound is 16.03 kJ/g for sodium cyclamate and 16.49 kJ/g for sucrose.
A solution is made by mixing 500 mL of .167 M NaOH with 500 mL of .1 M CH3COOH. Calculate the equalibrium concentrations of H+. CH3COOH, CH3COO-, OH- and Na+
The balloon ascends to altitude of 1600 meters and its volume increased to 6.00 L. Assuming that the temp of the gas didnt change during the ascent, calculate the atmospheric pressure at 1600 meters in mmHg.
an iron bar of mass 869 - g cools from 90 oc to 5 oc gt calculate the heat released in kilojoules by the metal.
The equilibrium concentration of HA will be less than the stoichiometric concentration because some or all of HA ionizes.
In a titration of 50.0mL of 0.1000 M formic acid with 0.100 M KOH, the titration error must be no more than 0.05mL. What indicator can be chosen to realize this goal
if the formula for magnesium fluoride is mgf2 and the formula for potassium chlorate is kclo3 then what is the formula
In a laboratory investigation involving a neutralization reaction, a scientist adds potassium hydroxide to nitric acid (balanced reaction following):
A 16.96 gram sample of an organic compound containing C, H and O is analyzed by combustion analysis and 16.58 grams of CO2 and 3.394 grams of H2O are produced.
137Cs decays by beta minus emission to an isomeric state in 137Ba which then decays by the emission of a gamma-ray. If we start with a 4 mCi of pure 137Cs, define what will be the activity of 137mBa after five minutes. The half-lives of 137Cs as well..
Mg + 2HCl --> MgCl2 + H2 For a mass of 0.013 g Mg and 5.0 mL of 1.00 M HCl, in a flask with V = 140.612 mL at 23.5?C. Calculate the initial and final pressure (atm).
The solubility of caffeine in water is 2.2mg/mL at 25 degrees celsius and 670 mg/mL at 100 degrees celsius. How many mL of boiling water would it take to dissolve 23g of caffeine
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