Select all the ways in which two substances can be different. Two substances can be composed of different chemical elements. Two substances can be composed of the same chemical elements, but the substances can have crystal structures with atoms that are arranged differently. Two substances can be composed of molecules that contain the same chemical elements but have different numbers of atoms of each element. Submit

To determine the ways in which two substances can be different, we can analyze the provided statements: 1. **Different Chemical Elements**: Two substances can be composed of different chemical elements. This means that the substances are fundamentally different at the elemental level. 2. **Same Chemical Elements, Different Crystal Structures**: Two substances can be composed of the same chemical elements, but they can have different crystal structures. This indicates that even if the substances are made of the same elements, their arrangement at the atomic level can lead to different properties. 3. **Same Chemical Elements, Different Molecular Composition**: Two substances can be composed of molecules that contain the same chemical elements but have different numbers of atoms of each element. This means that the molecular structure and composition can vary, leading to different substances. Based on this analysis, all three statements describe valid ways in which two substances can be different. Therefore, the answer includes all the provided options.