Which of the following characteristics must be present for a substance to be called a mineral? a. have a crystal structure b. has an unpredictable chemical structure c. can be liquid or solid d. can be organic or inorganic

How has the scientific community addressed the safety of chemicals? a. chemicals are repeatedly tested, even those that have existed for a long time. b. existing chemicals are tested if they have never been tested before. c. chemicals are tested if they are suspected to have caused a problem. d. only new chemicals are tested.

At 300 mm hg, a gas has a volume of 380 l, what is the volume at standard pressure

Water's surface tension and heat storage capacity are accounted for by its a) orbitals b) weight c) hydrogen bonds d) mass e) size