HELLPP PLZZZ ASAPP! Which statements are true of molecules of a gas? Select the two correct answers.

- They are held together by intermolecular forces.
- They move faster than molecules of a liquid or gas.
- They do not move as fast as molecules of a liquid.
- They have no attraction to each other.
- They are close together.

The skeletal system performs a variety of functions that are crucial to maintaining life processes. what function is performed in the bone marrow, but not in the ossified bones of the skeleton? a oxygen transportation c mineral storage b. muscle attachment d red blood cell production

One way in which the useful metal copper is produced is by dissolving the mineral azurite, which contains copper(ii) carbonate, in concentrated sulfuric acid. the sulfuric acid reacts with the copper(ii) carbonate to produce a blue solution of copper(ii) sulfate. scrap iron is then added to this solution, and pure copper metal precipitates out because of the following chemical reaction: (s) (aq) (s) (aq) suppose an industrial quality-control chemist analyzes a sample from a copper processing plant in the following way. he adds powdered iron to a copper(ii) sulfate sample from the plant until no more copper will precipitate. he then washes, dries, and weighs the precipitate, and finds that it has a mass of .

Abaker touches a pie right after taking it out of the oven. which statement best explains why the pie feels hot?