The document contains review questions about chemistry concepts including: - Cellular respiration and the composition of rocks would be determined by inorganic chemistry. Research on lithium reactions and new medications would involve inorganic chemistry. - A homogeneous mixture of an element and compound is represented by carbon dioxide gas. - Chromatography uses a mobile and stationary phase to separate mixtures. - Statements about elements existing as atoms or molecules and compounds existing as only molecules are false. Pure substances like water and carbon dioxide are examples. - A solution is a homogeneous mixture. Methods to separate mixtures include distillation, chromatography, and filtration. These can separate heterogeneous mixtures into their pure components.