Newly synthesized compounds are often analyzed by burning the compound and colle

Question

Newly synthesized compounds are often analyzed by burning the compound and collecting the evolved CO2 and H20 (to determine the mass % of C and H), and by measuring the osmotic pressure of the solution of the compound (to determine the molar mass). Calculate the empirical and molecular formulas of a compound, C?H?Cr?, given the following: 1) The compund contains 73.94% C and 8.22% H. The rest is Cr. 2) At 25 degrees celius, the osmotic pressure of a solution containing 5.00 mg of the unknown dissolved in 100 mL of chloroform of 3.17 mm Hg.

Explanation / Answer

it may help u chemistry.about.com/od/workedchemistryproblems/a/How-To-Calculate-The-Empirical-And-Molecular-Formula-Of-A-Compound.htm

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