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Since the freezing point of a solution depends on the relative number of particles, what would you caclcuate to be the freezing point of 0.1 m solutions in water of (a) NaCl, (b) BaCl2? Assume that these salts are 100% ionized in solution. (Compare your answers with the actual respective freezing points: -0.348 degrees C and -0.407 degrees C. The difference is due to the decreased activity of the ions. Because of the attractive forces between the postively and negatively charged ions, they do not move completly independently of one another.)
Find out the exact significant figures for each of the values - Indicate the number of significant figures
cunaturally occurring consists of 2 isotopes 63cu and 65cu and has a relative atomic mass ar of 63.55 considering this
graduated cylinder contains 155 of water. A 19.0 piece of iron (density = 7.86 ) and a 18.0 piece of lead are added. What is the new water level in the cylinder?
when a solution of cuii chloride cucl2 is added to a solution of potassium sulfide k2s a black precipitate of copper
explain why the coupling of the diazonium salt with a phenol or an aromatic amine occurs at the para position.
many enzymes are inhibited irreversibly by heavy-metal ions such ashg2 cu2 or ag which can react with essential
Nicotine is responsible for the addictive properties of tobacco. Assume Kb1= 1.05 x 10^-6 and Kb2= 1.32 x 10^-11. Determine the pH of a 0.00120 M solution of nicotine.
Determine the values for the equilibrium constants for the following reactions. (Hint: When reaction equations are added, the equilibrium expressions are multiplied.) (a) Na2O(s) + 1/2 O2(g) Na2O2(s) (b) NaO(g) + Na2O(s) Na2O2(s) + Na(l) (c) 2 NaO..
The pKa of the acid function at the 2-position is approximately 2, whereas that at the 1 position is about 3. Which of the 2 is more acidic and why
what is the geometry of a carbon atom involved in a triple
A Technologist is performing a colorimetric assay with a ELISA absorbance reader. The assay's color, when tested in a standard spectrophotomer is linear to an absorbance
Why does the nitrogen atom of NH2 (and not the nitrogen atom of the NH) group of phenyl hydrazine act as the nucleophilic site in the format ion of the phenylhydrazones.
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