# Chapter 2 - Atoms, Molecules, and Ions - Exercises: 2.49a

AlBr3

#### Work Step by Step

Molecular formulas tell you how many atoms of each element are in a compound, and empirical formulas tell you the simplest or most reduced ratio of elements in a compound. We have AL2Br6 so the common denominator is 2. Dividing by 2 gives AlBr3.

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