Domanda del libro di testo
Classify each of the following as a pure substance or a mixture:
c. ice (H2O)
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Ch.3 Matter and Energy
Timberlake14th EditionChemistry: An Introduction to General, Organic, and Biological ChemistryISBN: 9781292472249
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TOC.tableOfContents
- Ch.1 Chemistry in Our Lives19
- Ch.2 Chemistry and Measurements80
- Ch.3 Matter and Energy53
- Ch.4 Atoms and Elements58
- Ch.5 Nuclear Chemistry42
- Ch.6 Ionic and Molecular Compounds57
- Ch.7 Chemical Quantities and Reactions38
- Ch.8 Gases30
- Ch.9 Solutions50
- Ch.10 Acids and Bases and Equilibrium64
- Ch.11 Introduction to Organic Chemistry: Hydrocarbons77
- Ch.12 Alcohols, Thiols, Ethers, Aldehydes, and Ketones82
- Ch.13 Carbohydrates54
- Ch.14 Carboxylic Acids, Esters, Amines, and Amides91
- Ch.15 Lipids61
- Ch.16 Amino Acids, Proteins, and Enzymes84
- Ch.17 Nucleic Acids and Protein Synthesis86
- Ch.18 Metabolic Pathways and ATP Production73
Timberlake14th EditionChemistry: An Introduction to General, Organic, and Biological ChemistryISBN: 9781292472249Non è quello che usi tu?Cambia libro di testo
Capitolo 3, Problema 1d
Classify each of the following pure substances as an element or a compound:
d. rust (Fe2O3)
Guida verificata passo dopo passo1
Identify the chemical formula of the substance provided. In this case, the formula is Fe₂O₃.
Analyze the formula to determine if it consists of only one type of atom or multiple types of atoms. Fe₂O₃ contains two different elements: iron (Fe) and oxygen (O).
Recall the definition of an element: a pure substance that consists of only one type of atom. Since Fe₂O₃ contains more than one type of atom, it cannot be classified as an element.
Recall the definition of a compound: a pure substance formed when two or more different elements are chemically bonded together in a fixed ratio. Fe₂O₃ fits this definition because it is composed of iron and oxygen atoms chemically bonded in a 2:3 ratio.
Classify rust (Fe₂O₃) as a compound based on the analysis above.
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Element
An element is a pure substance that cannot be broken down into simpler substances by chemical means. It consists of only one type of atom and is represented on the periodic table. Examples include hydrogen (H), oxygen (O), and iron (Fe). Elements are the fundamental building blocks of matter.
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Percorso guidato
01:14
Valence Electrons of Elements (Simplified) Example 1
Compound
A compound is a pure substance formed when two or more different elements chemically bond together in fixed proportions. Compounds have unique properties that differ from the individual elements that compose them. For example, water (H₂O) is a compound made from hydrogen and oxygen, while rust (Fe₂O₃) is a compound formed from iron and oxygen.
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02:11Naming Ionic Compounds
Chemical Formula
A chemical formula is a symbolic representation of a compound that indicates the types and numbers of atoms present. For instance, the formula for rust, Fe₂O₃, shows that it contains two iron (Fe) atoms and three oxygen (O) atoms. Understanding chemical formulas is essential for identifying whether a substance is an element or a compound.
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Percorso guidato
02:04Chemical Reaction: Chemical Change Concept 2
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