Answer:
Step-by-step explanation:
The sample that represents a homogeneous mixture is option (2) C₂H5OH (aq). Explanation: - C₂H5OH represents ethanol, which is a liquid. - The (aq) in option (2) indicates that C₂H5OH is dissolved in water, forming an aqueous solution. - A homogeneous mixture is one where the components are uniformly distributed and cannot be visually distinguished. In an aqueous solution, such as C₂H5OH (aq), the ethanol molecules are evenly dispersed within the water molecules, resulting in a homogeneous mixture. 8. The substance that can be decomposed by chemical change, based on Table S, is option (3) methanol (CH3OH). Explanation: - Methanol (CH3OH) is an organic compound. - Table S refers to a specific table or reference that provides information about the properties or characteristics of substances. - Methanol can undergo a chemical change known as a decomposition reaction, where it breaks down into simpler substances, such as carbon dioxide (CO2) and water (H2O). 9. NaCl(aq) is classified as a compound with atoms in a fixed proportion, which is option (1). Explanation: - NaCl represents sodium chloride, which is a common salt. - (aq) indicates that NaCl is dissolved in water, forming an aqueous solution. - A compound is a substance made up of two or more elements chemically combined in a fixed proportion. - In the case of NaCl, it consists of sodium (Na) and chlorine (Cl) atoms combined in a fixed 1:1 ratio, meaning that for every sodium atom, there is one chlorine atom.