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The diameter of a molecule is approximately 1x10^(-18) mets. If 1 nm is equal to 10^(-9)m and 10 Ångstroms, what is the diameter of the nucleus in Ångstroms?
What weight of A would be removed from a solution of 10g of A in 100mL of water by a single extraction with 100 mL of hexanes? What weight of A would be removed by four successive extraction with 25-mL portions of hexanes?
Calculate the pH after 0.020 mol NaOH is added to 1.00 L of a solution which is 0.100 M NH2OH and 0.100 M HONH3Cl.
Explain why 0.10 M BaCl2 has a higher osmotic pressure that 0.10 M glucose and explain why molarity and molality are nearly the same in dilute solutions.
Determine the heats of formation or the steric energies of the exo- and endo-anhydride adducts using a molecular mechanics program.
Esters and amides can be most easily and conveniently prepared by nucleophilic substitution reactions on: (select one or more) alcohols carboxylates acyl chlorides carboxylic acids amines acid anhydrides another amides
Calculate the number of calories needed to increase the temperature of 50.0 g of copper metal from 21.0 degrees C to 75.0 degrees C. Given, the specific heat of copper is 0.382 cal/g x degrees C.
What mass of water (in grams) forms from the reaction of 2.58 L of hydrogen gas and 2.26 L of oxygen gas?
explain how to identify a molecular compound based on a: chemical formula and on a systematic name
A first order decomposition reaction is observed to have the following rate constants at the indicated temperatures. using an Arrhenious plot, find the activation energy
Find the molarity of a Ca(OH)2 solution,given that 363 mL of it is neutralized in a titration by 187 mL of 0.0058 M HNO3.
A piece of sodium metal reacts completely with water as follows. 2 Na(s) + 2 H2O(l) ->2 NaOH(aq) + H2(g) The hydrogen gas generated is collected over water at 25.0°C. The volume of the gas is 295 mL measured at 1.00 atm.
After a fatty acid has been desaturated, can it be desaturated a second time immediately thereafter? Why, or why not?
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