Which wave has a wavelengh that is most likely seen as red light?

How many molecules are present in 3 mols of silicon dioxide (sio2)?

At very high pressures, gases become and will eventually a) more dense; become hotter b) more dense; change to a liquid or solid c) less dense; combust d) less dense; turn into a liquid

The coefficient of friction is a number that represents the resistance to sliding between two in contact with one another.