When Marc adds some of the sample to a blue liquid, a red precipitate appears. When steam is formed from water, a chemical change has occurred. Freezing is a physical change. Assume the same amount of heat energy is added to each. Multiple Choice Place an X across the letter that corresponds to your answer to each question.
Molecules are far apart and free to move past one another independently.
Molecules are far apart and in a set pattern. Molecules are close together and in a set pattern. Molecules are close together and free to move past one another. If you consider a very small portion of a sample that is the same throughout, the density of the small sample will be compared to the original sample. The object weighed 24.8 g.