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QuestionChemistry

Which of the following molecules is nonpolar? A. CH^2F^2 B. BFCl^2 C. NH^2Br D. SeO^3 E. SCl^2
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Answer

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Step 1:
Let's solve this step by step by analyzing the molecular geometry and polarity of each molecule.

Step 2:
: Understand Polarity Determination

To determine molecular polarity, we need to: - Identify the central atom - Determine the molecular geometry - Analyze the electronegativity differences between atoms - Check if bond dipoles cancel out

Step 3:
: Analyze CH^2F^2

- Result: $$\text{CH}_{2}\text{F}_{2}$$ is POLAR
- Central atom: Carbon (C) - Geometry: Tetrahedral - Fluorine is more electronegative than hydrogen - Bond dipoles do not cancel completely

Step 4:
: Analyze BFCl^2

- Result: $$\text{BFCl}_{2}$$ is POLAR
- Central atom: Boron (B) - Geometry: Trigonal planar - Fluorine and chlorine have different electronegativities - Bond dipoles do not cancel

Step 5:
: Analyze NH^2Br

- Result: $$\text{NH}_{2}\text{Br}$$ is POLAR
- Central atom: Nitrogen (N) - Geometry: Trigonal pyramidal - Bromine and hydrogens have different electronegativities - Bond dipoles do not cancel

Step 6:
: Analyze SeO^3

- Result: $$\text{SeO}_{3}$$ is NONPOLAR
- Central atom: Selenium (Se) - Geometry: Trigonal planar - Oxygen atoms are highly electronegative - Bond dipoles cancel out due to symmetry

Step 7:
: Analyze SCl^2

- Result: $$\text{SCl}_{2}$$ is POLAR
- Central atom: Sulfur (S) - Geometry: Bent - Chlorine atoms have different electronegativity - Bond dipoles do not cancel

Final Answer

SeO^3 is the nonpolar molecule.