Who hypothesized that electrons orbit around a nucleus

What is the term for a process by which molecules of a solvent tend to pass through a semipermeable membrane from a less concentrated solution into a more concentrated one, thus equalizing the concentrations on each side of the membrane? 1.

What are the two major types of cells that occur in nature?

A compound's empirical formula is ch3. if the formula mass is 30 amu, what is the molecular formula?

Question 18The osmotic pressure exerted by a solution is equal to the molarity multiplied by the absolute temperature and the gas constant. Suppose the osmotic pressure of a certain solution is measured to be at an absolute temperature of.

1) express 23kg in miligrams

Which of the following gases in Earth's atmosphere would you expect to find as molecules and which as individual atoms? a. Nitrogen b. Oxygen c. Argon

A substance that does not conduct electricity as a solid but does conduct electricity when melted is most likely classified as (1) an ionic compound (2) a molecular compound (3) a metal (4) a nonmetal

What is done with the reactive sodium after the reaction to make sure the products are safe in an air bag?

Which of the following does not indicate a chemical change? precipitate formation crushing a solid into a powder color change gas evolution

Reactions cannot occur without a certain minimum amount of energy. what is this minimum amount of energy called?