Use the Molecular Model to explain each observation: (a) The density of solid nitrogen molecules is greater than the density of nitrogen molecules in air. (b) Heat flows from hot objects to colder ones. (c) Perfume spilled at one end of a room can be smelled at the other end after a few seconds.

Which statement is true about ionic compounds?

Ageochemist examines a piece of metal that he found in the soil. he performs tests to identify the metal from its density, electrical conductivity, and melting point. which statement best describes his investigation? a. he is determining physical properties that are sufficient to identify the metal.b. he is determining chemical properties that are sufficient to identify the metal.c. he is determining physical properties that are insufficient to identify the metal.d. he is determining chemical properties that are insufficient to identify the metal.

Building glycogen from glucose molecules is an example of