Question

istry a phs (ne) / unit 2 - atomic structure
which two of these are properties of water?
water has poor thermal conductivity.
water is nonpolar.
water freezes at 100 °c.
water is clear.

1. choose the best answer.

look at the diagram. what does the diagram show?
hydrogen atoms are not perfectly held on opposite sides of oxygen.
hydrogen atoms are held at a 45° angle.

Explanation:

Water is a clear - liquid. Its thermal conductivity is relatively low compared to metals. Water is a polar molecule due to the bent molecular shape and electronegativity difference between oxygen and hydrogen. It freezes at 0°C and boils at 100°C. In the water - molecule diagram, the hydrogen atoms are not perfectly on opposite sides of the oxygen atom, and the H - O - H bond angle is about 104.5°, not 45°.

Answer:

Water has poor thermal conductivity.
Water is clear.
Hydrogen atoms are not perfectly held on opposite sides of oxygen.