Table of contents

1. Intro to General Chemistry3h 48m
2. Atoms & Elements4h 16m
3. Chemical Reactions4h 10m
4. BONUS: Lab Techniques and Procedures1h 38m
5. BONUS: Mathematical Operations and Functions48m
6. Chemical Quantities & Aqueous Reactions3h 53m
7. Gases3h 49m
8. Thermochemistry2h 37m
9. Quantum Mechanics2h 58m
10. Periodic Properties of the Elements3h 9m
11. Bonding & Molecular Structure3h 29m
12. Molecular Shapes & Valence Bond Theory1h 57m
13. Liquids, Solids & Intermolecular Forces2h 23m
14. Solutions3h 1m
15. Chemical Kinetics2h 53m
16. Chemical Equilibrium2h 29m
17. Acid and Base Equilibrium5h 1m
18. Aqueous Equilibrium4h 47m
19. Chemical Thermodynamics1h 50m
20. Electrochemistry2h 42m
21. Nuclear Chemistry2h 36m
22. Organic Chemistry5h 7m
23. Chemistry of the Nonmetals2h 39m
24. Transition Metals and Coordination Compounds3h 16m

7. Gases

Gas Stoichiometry

General Chemistry

7. Gases

Gas Stoichiometry

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Multiple Choice

During photosynthesis, which gas is released by plants into the atmosphere?

Hydrogen

Carbon Dioxide

Oxygen

Nitrogen

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Verified step by step guidance

Understand the process of photosynthesis: Photosynthesis is a process used by plants, algae, and some bacteria to convert light energy, usually from the sun, into chemical energy stored in glucose.

Identify the reactants and products: The general equation for photosynthesis can be written as: 6CO₂ + 6H₂O + light energy → C₆H₁₂O₆ + 6O₂. This shows that carbon dioxide (CO₂) and water (H₂O) are used to produce glucose (C₆H₁₂O₆) and oxygen (O₂).

Focus on the gas released: From the equation, it is clear that oxygen (O₂) is a product of photosynthesis and is released into the atmosphere.

Consider the role of oxygen: Oxygen is a byproduct of the light-dependent reactions of photosynthesis, specifically during the splitting of water molecules (photolysis) in the chloroplasts.

Conclude with the correct answer: Based on the photosynthesis equation and the process, the gas released by plants into the atmosphere during photosynthesis is oxygen (O₂).