Do you have to have variables in every single science experiment?

What 2 parts of an atom does the atomic # represent?

When patterning a shotgun, what is a sufficient percentage of pellets within a 30-inch circle? at least 25% of the load, concentrated in the center at least 35% of the load, with even distribution at least 45% of the load, concentrated in the center

The pressure of a gas in a container is 152 mm Hg, the equivalent to

Which of the following will affect the rate of a chemical reaction? 1) solvent concentration 2) solution volume 3) solute mass 4) solute concentration

Explain why hexane will dissolve benzene but will not dissolve sodium chloride.

If you went to the moon, how would your mass change relative to your mass on Earth? It would be the same on the moon as on Earth It would increase because of less gravity It would decrease because of less gravity None of the above

The pH of a solution is 2.60. What is the [H3O+] for the solution? 2.51 * 102 M 3.98 * 102 M 2.51 * 10-3 M 3.98 * 10-3 M

there are 25 elements found in living things. how many of these elements are found in some organisms but not at all?

What is every stored in atomic bonds called

What happens to energy when Sally kicks a soccer ball? A. Kinetic energy is transformed to chemical energy in muscles. B. Potential energy is transformed to chemical energy in muscles. C. Kinetic energy is transferred from the leg to the soccer ball.