Why are changes in phase physical changes?

How Do You Get Different Coloured Fireworks? ...

Which of the following statements about the kinetic molecular theory are correct? a. The average kinetic energy of the molecules is not related to the absolute temperature b.

When light strikes a transparent material, most of the light is absorbed or reflected. a. true b. false Is it B?

What evidence of a chemical reaction might you see dropping an alka seltzer

If and electron is heated or electrified, it will give off light energy as it moves from a lower to a higher electron energy level. True or False

Determine the [oh-] concentration of a 0.741 m koh solution at 25°c.

In the lab, students decomposed a sample of calcium carbonate by heating it over a Bunsen burner and collected carbon dioxide according to the following equation: CaCO3 (s) CaO (s) CO2 (g) (a) How many mL of carbon dioxide gas were generated by the

J. J. Thomson A) Electrons are in orbital levels. John Dalton B) Atoms are the smallest unit of an element. Ernest Rutherford C) Electrons are scattered within the atom. Niels Bohr D) Protons are at the center of an atom.

Which answer best describes an alloy

Olive oil has a density of 0.92 g/mL. How much would 1 liter of olive oil weigh in grams?