The diagram above represents solid carbon dioxide, better known as dry ice. Which diagram below best represents some of the dry ice after it sublimes into a gas?

Which of the following statements is true? a. elements in the last period are radioactive. b. atomic weight is the same as atomic mass. c. elements in the same group have the same number of electron shells. d. atomic number equals the number of neutrons in the nucleus of an atom.

0.2348 grams of pbcl2 used to form 44.0 ml of solution.

What effect does a decrease in temperature have on the overall rate of a chemical reaction? a decrease in temperature decreases . the reaction rate will