Final answer:
To find the mass of Cl2 produced from the decomposition of AlCl3, one must first calculate the moles of AlCl3 using its molar mass and then use the stoichiometry from the balanced equation to determine the moles and mass of Cl2.
Step-by-step explanation:
The question is concerning the decomposition of aluminum chloride (AlCl3) to form chlorine gas (Cl2) and how to calculate the mass of Cl2 that will be produced from a given mass of AlCl3. To solve this, we first need to convert the mass of AlCl3 to moles using its molar mass (133.33 g/mol). After that, we refer to the balanced chemical equation which indicates that for every 2 moles of AlCl3 that decompose, 3 moles of Cl2 are produced. Then using the molar mass of Cl2 (70.90 g/mol), we convert the moles of Cl2 produced into grams. This two-step process allows us to determine the final mass of chlorine gas formed.