Final answer:
A chemist would categorize coffee as a homogeneous mixture, hydrogen as a pure substance in the gas state, and an egg as a complex mixture of nutrients. Each of these demonstrates a different aspect of matter and serves as essential examples in understanding how matter is composed and classified in chemistry.
The correct answer is options A
Step-by-step explanation:
The question asked by the student involves categorizing different substances as examples of matter from a chemist's perspective. Matter can exist in various physical states, and chemists categorize these based on their physical properties and composition. When it comes to items like coffee, hydrogen, and an egg, here's how a chemist would categorize them:
- Coffee, particularly when filtered, is a homogeneous mixture that contains various substances dissolved in water, thus, it is considered a solution.
- Hydrogen is a chemical element with the symbol H and atomic number 1. At room temperature, it exists as a diatomic gas (Hâ‚‚), making it a pure substance in the gaseous state.
- An egg consists of various components including water, proteins, fats, vitamins, and minerals. It cannot be classified simply as an element, compound, or homogeneous mixture. Typically, an egg is considered a complex mixture of these substances, which are separable by physical means.
Each of these items represents a different aspect of matter, showcasing diversity in composition and state. Coffee as a homogeneous mixture, hydrogen as a pure substance in the gas state, and an egg as a complex mixture of nutrients are all key concepts that align with the principles of chemistry and the various forms that matter can take.