Question

1. when a pair of electrons is shared equally between two atoms, the bond formed is called a(n): a. ionic bond b. hydrogen bond c. carbon bond d. polar covalent bond e. nonpolar covalent bond 15. in the chemical reaction, hcl + naoh → h₂o + nacl, the chemical naoh is considered to be: a. water b. base c. product d. acid e. salt 16. hydrogen bonding between water molecules is responsible for: a. polarity b. denaturation of proteins c. enzyme structure d. nonpolar covalent bonding e. surface tension

Explanation:

1. When electrons are shared equally between two atoms, a non - polar covalent bond is formed. In a non - polar covalent bond, the electronegativity difference between the two atoms is zero or very small, so the bonding electrons are shared evenly.
2. In the reaction HCl + NaOH → H₂O+NaCl, NaOH is a base. Bases are substances that can accept a proton (H⁺) in a chemical reaction. NaOH dissociates in water to produce OH⁻ ions which can react with H⁺ from an acid.
3. Hydrogen bonding between water molecules is responsible for surface tension. Hydrogen bonds are relatively strong intermolecular forces that occur when a hydrogen atom is covalently bonded to a highly electronegative atom (such as O, N, or F) and is attracted to another electronegative atom in a neighboring molecule. In water, these hydrogen bonds create an inward - pulling force at the surface, resulting in surface tension.

Answer:

1. d. nonpolar covalent bond
2. d. base
3. a. hydrogen bonding between water molecules