Table of contents

1. Matter and Measurements4h 31m
2. Atoms and the Periodic Table5h 23m
3. Ionic Compounds2h 18m
4. Molecular Compounds2h 18m
5. Classification & Balancing of Chemical Reactions3h 17m
6. Chemical Reactions & Quantities2h 27m
7. Energy, Rate and Equilibrium3h 46m
8. Gases, Liquids and Solids3h 25m
9. Solutions4h 10m
10. Acids and Bases3h 29m
11. Nuclear Chemistry56m
BONUS: Lab Techniques and Procedures1h 38m
BONUS: Mathematical Operations and Functions47m
12. Introduction to Organic Chemistry1h 34m
13. Alkenes, Alkynes, and Aromatic Compounds2h 12m
14. Compounds with Oxygen or Sulfur1h 6m
15. Aldehydes and Ketones1h 1m
16. Carboxylic Acids and Their Derivatives1h 11m
17. Amines39m
18. Amino Acids and Proteins1h 51m
19. Enzymes1h 37m
20. Carbohydrates1h 41m
21. The Generation of Biochemical Energy2h 8m
22. Carbohydrate Metabolism2h 22m
23. Lipids2h 26m
24. Lipid Metabolism1h 45m
25. Protein and Amino Acid Metabolism1h 37m
26. Nucleic Acids and Protein Synthesis2h 54m

4. Molecular Compounds

Bonding Preferences

GOB Chemistry

4. Molecular Compounds

Bonding Preferences

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1:16 minutes

Problem 88d

Textbook Question

The following formulas are unlikely to be correct. What is wrong with each?
d. C₂OS

Verified step by step guidance

Step 1: Understand the problem. The formula C₂OS represents a chemical compound, but it appears to be incorrectly written. Chemical formulas must follow specific rules for representing elements and their proportions in a compound.

Step 2: Review the rules for writing chemical formulas. Each element in a formula is represented by its chemical symbol (e.g., C for carbon, O for oxygen, S for sulfur). Subscripts indicate the number of atoms of each element in the compound. The formula should also reflect the correct stoichiometry and bonding arrangement.

Step 3: Analyze the formula C₂OS. The formula suggests there are 2 carbon atoms, 1 oxygen atom, and 1 sulfur atom. However, it does not specify how these atoms are bonded or arranged, which is crucial for determining the compound's validity.

Step 4: Consider common compounds containing carbon, oxygen, and sulfur. For example, carbonyl sulfide (COS) is a valid compound, but C₂OS does not correspond to a known or stable chemical structure. The issue may be that the formula does not represent a real compound or violates bonding rules.

Step 5: Conclude that the formula C₂OS is incorrect because it does not correspond to a known compound and fails to follow proper chemical notation or bonding rules. Suggest revisiting the intended compound and ensuring the formula accurately represents its structure.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Chemical Formula Structure

A chemical formula represents the elements in a compound and their respective quantities. In the case of C₂OS, the formula suggests a compound containing two carbon (C) atoms, one oxygen (O) atom, and one sulfur (S) atom. Understanding the correct representation of elements and their bonding is crucial for identifying inaccuracies in chemical formulas.

Valency and Bonding

Valency refers to the combining capacity of an element, which is determined by the number of electrons in its outer shell. For example, carbon typically forms four bonds, while oxygen forms two and sulfur can form multiple bonds. Analyzing the valency of the elements in C₂OS helps to determine if the proposed formula is chemically feasible based on how these elements can bond.

Common Chemical Compounds

Familiarity with common chemical compounds and their formulas aids in identifying errors in proposed formulas. C₂OS does not correspond to a well-known or stable compound, which raises questions about its validity. Recognizing established compounds helps in evaluating the plausibility of new or unfamiliar chemical formulas.

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