Anserw 1 and 2

Chemistry
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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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Anserw 1 and 2

**The Search for Life Continues**

Scientists have identified two similar molecules as water-like candidates to search for on other planets: methane and methanol. Answer the questions below to help explain the importance of the investigation.

**Diagram: Structure of Methane and Methanol Molecules**

- **Methane (CH₄):** 
  - Structure shows a central carbon (C) atom bonded to four hydrogen (H) atoms in a tetrahedral shape.

- **Methanol (CH₄O):**
  - Structure shows a central carbon (C) atom bonded to three hydrogen (H) atoms and one hydroxyl group (OH).
  - The OH group leads to polarity due to oxygen (O) having a partial negative charge (δ-) and hydrogen having a partial positive charge (δ+).

On the right side, there is a sketched diagram of a polar molecule, highlighting the partial charges on the oxygen and hydrogen atoms of the OH group.

**1. List three properties scientists should observe or measure for these substances.**

**2. Explain your choices from #1: how do these properties relate to a substance's importance for life?**

**3. What results should scientists see for each of these properties if the substance is similar to water?**
   - Handwritten note: "Both have similar properties (Methane & Water) is Hydrogen Bonding."

**4. Which substance, methane or methanol, do you think would show the results you predicted in #3?**
   - Handwritten answer: "Methanol (CH₃OH)."
Transcribed Image Text:**The Search for Life Continues** Scientists have identified two similar molecules as water-like candidates to search for on other planets: methane and methanol. Answer the questions below to help explain the importance of the investigation. **Diagram: Structure of Methane and Methanol Molecules** - **Methane (CH₄):** - Structure shows a central carbon (C) atom bonded to four hydrogen (H) atoms in a tetrahedral shape. - **Methanol (CH₄O):** - Structure shows a central carbon (C) atom bonded to three hydrogen (H) atoms and one hydroxyl group (OH). - The OH group leads to polarity due to oxygen (O) having a partial negative charge (δ-) and hydrogen having a partial positive charge (δ+). On the right side, there is a sketched diagram of a polar molecule, highlighting the partial charges on the oxygen and hydrogen atoms of the OH group. **1. List three properties scientists should observe or measure for these substances.** **2. Explain your choices from #1: how do these properties relate to a substance's importance for life?** **3. What results should scientists see for each of these properties if the substance is similar to water?** - Handwritten note: "Both have similar properties (Methane & Water) is Hydrogen Bonding." **4. Which substance, methane or methanol, do you think would show the results you predicted in #3?** - Handwritten answer: "Methanol (CH₃OH)."
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