Organic Chemistry: Why Mirror-Image Molecules Smell Different
From carbon's four bonds to soap, aspirin and margarine, the logic of the molecules that make up life and everyday products.
Organic Chemistry · 50 questions
Try 3 questions
1. Why is carbon so well suited to forming the molecules of life?
- It is the most abundant element on Earth
- It forms four stable bonds and long chains
- It reacts with almost nothing else
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Answer: It forms four stable bonds and long chains
Carbon bonds strongly to itself and to H, O and N in chains, branches and rings, allowing endless variety.
2. In methane, CH4, what is the angle between any two C-H bonds?
- Exactly 180 degrees
- About 109.5 degrees
- Exactly 90 degrees
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Answer: About 109.5 degrees
Four sp3 bonds spread as far apart as possible in 3D, forming a tetrahedron rather than a flat cross.
3. How are the four atoms of acetylene (C2H2), the welding gas, arranged?
- In a tetrahedron
- In a straight line
- In a bent V shape
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Answer: In a straight line
Each carbon is sp-hybridized with a triple bond, so the bonds point in opposite directions at 180 degrees.
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