Question

the open spaces in waters crystal structure make it possible for ... (a) aquatic life to exist at the north pole. (b) water to have a low boiling point. (c) life to occur in hot springs. both (b) and (c). (a), (b), and (c). part k why doesnt oil mix with water? (a) nonpolar molecules repel water molecules. (b) polar molecules repel nonpolar molecules. (c) polar molecules attract one another. (d) nonpolar molecules attract one another. both (a) and (d).

Explanation:

1. For the first question, the open - spaces in water's crystal structure (ice) make it less dense than liquid water. This allows ice to float, creating a layer that insulates the water below, enabling aquatic life to exist at the North Pole. Water's boiling point is determined by intermolecular forces, not the crystal structure, and life in hot springs is related to organisms' heat - tolerance, not water's crystal structure.
2. For the second question, water is a polar molecule and oil is non - polar. Polar molecules attract one another through hydrogen bonding and other dipole - dipole interactions. Non - polar molecules do not interact well with polar water molecules. Non - polar molecules attract one another through London dispersion forces.

Answer:

A. aquatic life to exist at the North Pole.
C. Polar molecules attract one another.