During the 1800s, when most of the elements were being discovered, many chemists tried to classify elements based on their:

What are the 4 phases of matter in order of increasing engery content?

All of the following are homogeneous mixtures except a) sugar dissolved in water. b) orange juice. c) coffee with cream. d) household vinegar. e) apple juice

Reactions in cells take place at about a. 40°c b. 0° c. 100°c d. 60°c