You create a process to be used in conjunction with combustion analysis using chlorine gas to determine the amount of selenium in certain organic compounds.If there is selenium in the molecule, SeCl₂ (149.87 g/mol) is produced.Analysis of 28.20 g of an unknown compound produces 36.21 g CO₂, 18.53 g H₂O, and 30.83 g SeCl₂.The molar mass of the compound is about 137 g/mol.What is its molecular formula?

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Quizplus · Accepted Answer

The molecular formula is determined by calculating the moles of each product formed and then using the stoichiometry of the reaction to find the moles of each element in the original compound. Given the molar masses of CO (28.01 g/mol), H2O (18.015 g/mol), and SeCl4 (149.87 g/mol), and the masses of the products, we can calculate the moles of C, H, and Se in the original compound. The molar mass of the unknown compound is about 137 g/mol, which helps in determining the simplest whole number ratio of atoms in the molecule, leading to the molecular formula CS2H6Se.

You Create a Process to Be Used in Conjunction with Combustion