a. When6.847grams of a hydrocarbon, CxHy, were burned in a combustion

a. When 6.847 grams of a hydrocarbon, CxHy, were burned in a combustion

analysis apparatus, 21.49 grams of CO2 and 8.797 grams of H2O were produced.

In a separate experiment, the molar mass of the compound was found to be 28.05 g/mol. Determine the empirical formula and the molecular formula of the hydrocarbon.

  • Enter the elements in the order presented in the question.
  • empirical formula =
  • molecular formula =

b. A 6.820 gram sample of an organic compound containing C, H and O is analyzed by combustion analysis and 14.69 grams of CO2 and 6.017 grams of H2O are produced.

In a separate experiment, the molar mass is found to be 102.1 g/mol. Determine the empirical formula and the molecular formula of the organic compound.

  • Enter the elements in the order C, H, O
  • empirical formula =
  • molecular formula =

c. A 26.93 gram sample of iron is heated in the presence of excess fluorine. A metal fluoride is formed with a mass of 54.42 g. Determine the empirical formula of the metal fluoride.

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