Answer
Al₂Cl₆
Procedure
An empirical formula is a chemical formula showing the ratio of elements in a compound rather than the total number of atoms. It is the simplest whole number non-reducible ratio formula for a molecular formula or compound.
To find the empirical formula, we will need to follow the next steps:
0. Find the molar mass of each component (using the periodic table): Al=26.98, Cl=35.453
,1. Convert to moles: Al=0.7487, Cl=2.2509
,2. Find the smallest mole value: 0.7487
,3. Divide all components by the smallest value: Al=1, Cl=3.0065
,4. Round to closest whole numbers: Al=1, Cl=3
,5. Combine to get the empirical formula: AlCl₃
,6. Evaluate the weight of the current formula AlCl₃ = 133.34 g/mol
,7. Multiply by 2 to get the formula that matches the weight Al₂Cl₆ = 267 g/mol