Compute the apparent milar mass of the hydrocarbon

Assignment Help Chemistry

Reference no: EM13169131

The formula and the molecular weight of an inknown hydrocarbon compund are to be determined by element analysis and the freezing-point depressing method.

A) the hydrocarbon is found to contain 94.78 percent carbon anf 5.22 percwnt hydrogen. CALCULATE the empirical formula of the unknown hydrocarbon.

B) A solution is prepared by dissolving 2.53 grams of p-dichlorobenzene (molar mass 147 g/mol) in 25.86 grams of naphthalene (molar mass 128.2 g/mol). CALCULATE the molality of the p-dichlorobenzene solution.

C) The freezing point of pure naphthalene is determined to be 80.2 Degree Celsius. The solution prepared in (b) is found to have an initial freezing point of 75.7 Degree Celsius. Calculate the lolal freezing-point depression constant of naphthalene.

D) A solution of 2.40 grams of the unknown hydrocarbon dissolved in 26.7 grams of naphthalene is found to freeze initialy at 76.2 Degree Celsius. Caluculate the apparent milar mass of the unknown hydrocarbon on the basis of the freezing-point depression experiment above.

E) WHAT is the molecular formula of the unknown hydrocarbon?

Reference no: EM13169131

Questions Cloud

State what is the percent ionization of the acid : What is the percent ionization of a 0.177 M solution of this acid?

Compute the mean displacement of the harmonic oscillator : Calculate the mean displacement of the harmonic oscillator when it is in a quantum state ?. Use the Hermite polynomials in the attachment and the recursion relation to justify your answer through symmetry arguments.

Determine the probability of finding the particle : Consider a particle with quantum number n moving in a one-dimensional box of length l. Determine the probability of finding the particle in the left quarter of the box.

A student evaporated of a saturated tlcl solution : A student evaporated 100.0 mL of a saturated TlCl solution and found the solid TlCl she recovered weighed

Compute the apparent milar mass of the hydrocarbon : A solution of 2.40 grams of the unknown hydrocarbon dissolved in 26.7 grams of naphthalene is found to freeze initialy at 76.2 Degree Celsius. Caluculate the apparent milar mass of the unknown hydrocarbon on the basis of the freezing-point depress..

Explain chloride if the concentration of chlorine : Use the Nernst Equation to calculate Ecell at 25 C for electrolysis of aqueous sodium chloride if the concentration of chlorine in the brine solution is 4.5 M and the partial pressure of Cl2 is 0.001 atmospheres.

State the caloric content of a planter''s cocktail peanut : A student followed the procedure of this experiment to determine the Caloric content of a Planter's cocktail peanut. The peanut studied had a mass of 0.609 g before combustion and 0.053 g after combustion

Estimate the free energy change for the following reaction : Estimate the free energy change (?Grxn) for the following reaction at 298 K, if each gaseous substance is present at p = 0.30 atm. 2H2(g) + O2(g) ? 2H2O(l)

State chlorine will spontaneously react with iodide : Chlorine will spontaneously react with iodide to produce chloride and iodine.

User Account

All Pages