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

Molecular Models

GOB Chemistry

4. Molecular Compounds

Molecular Models

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1:24 minutes

Problem 86a

Textbook Question

If purple spheres represent iodine atoms, white spheres represent hydrogen atoms, and all the molecules are gases,

a. write the formula for each of the reactants and products.

Verified step by step guidance

Step 1: Analyze the image provided. The reactants consist of molecules with two red spheres connected together, representing oxygen gas (O₂), and molecules with one red sphere connected to one white sphere, representing hydrogen gas (H₂).

Step 2: Identify the products in the image. The products consist of molecules where one red sphere is connected to one white sphere, forming water (H₂O).

Step 3: Write the chemical formula for the reactants. The reactants are oxygen gas (O₂) and hydrogen gas (H₂).

Step 4: Write the chemical formula for the products. The product is water (H₂O).

Step 5: Summarize the reaction. The reaction involves hydrogen gas (H₂) and oxygen gas (O₂) combining to form water (H₂O). This is a synthesis reaction where two reactants combine to form a single product.

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Key Concepts

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

Chemical Formulas

Chemical formulas represent the composition of a substance using symbols for the elements and numerical subscripts to indicate the number of atoms. For example, H2O denotes two hydrogen atoms and one oxygen atom in a water molecule. Understanding how to write and interpret these formulas is essential for identifying reactants and products in chemical reactions.

Molecular Representation

Molecular representation uses visual models, such as spheres, to depict atoms and their connections in a molecule. In the provided images, red spheres represent oxygen atoms, while white spheres represent hydrogen atoms. This visual aid helps in understanding the structure of molecules and how they interact during chemical reactions.

Reactants and Products

In a chemical reaction, reactants are the starting substances that undergo transformation, while products are the substances formed as a result of the reaction. Identifying the reactants and products is crucial for writing balanced chemical equations, which reflect the conservation of mass and the stoichiometry of the reaction.

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