Electronegativity and Molecular Polarity

The video explores whether hexane (C6H14) is polar or nonpolar. It explains that hexane is a molecular compound made of carbon and hydrogen, both nonmetals. The video discusses electronegativity differences, noting that carbon has an electronegativity of 2.55 and hydrogen 2.20, resulting in a difference of 0.35. Since this difference is less than 0.5, hexane is classified as a nonpolar covalent compound. The video also highlights hexane's symmetrical structure, which causes any small dipoles to cancel out, reinforcing its nonpolar nature.

What type of compound is hexane (C6H14)?

• Acidic compound

• Covalent compound

• Metallic compound

• Ionic compound

Which of the following best describes the role of electronegativity in determining molecular polarity?

• It shows the color of a compound.

• It determines the mass of a molecule.

• It indicates the ability of an atom to attract electrons.

• It measures the size of atoms.

What is the electronegativity value of carbon used in the video?

• 2.55

• 1.90

• 3.00

• 2.20

What is the electronegativity difference between carbon and hydrogen in hexane?

• 0.15

• 0.75

• 0.35

• 0.55

Why is hexane considered a nonpolar molecule?

• It contains metal atoms.

• It has a symmetrical structure.

• It is an ionic compound.

• It has a high electronegativity difference.

What happens to small dipoles in a symmetrical molecule like hexane?

• They change the molecule's color.

• They amplify each other.

• They cancel out.

• They become stronger.

Which of the following statements is true about hexane's polarity?

• Hexane is a polar covalent compound.

• Hexane is a nonpolar covalent compound.

• Hexane is an ionic compound.

• Hexane is a metallic compound.