(Solved): Identify each transition in this flowchart as a chemical change or a physical change. Classify ea ...

Identify each transition in this flowchart as a chemical change or a physical change. Classify each of the following as an element, a compound, a homogeneous mixture, or a heterogeneous mixture. Answer Bank Earth's atmosphere, which contains about \( 78 \% \) nitrogen, \( 21 \% \) oxygen, and small amounts of other gases phosphorus trichloride, a substance containing phosphorus and chlorine atoms in a fixed \( 1: 3 \) ratio