What are the three types of scientific investigations?

a. investigative, comparative, and experimental
b. descriptive, collective, and investigative
c. collective, comparative, and experimental
d. descriptive, comparative, and experimental

What type of reaction is represented by the following example? 2co2 (g) + 4h2o (l) + 1452 kj 2ch3oh (l) (g) + 3o2 (g) exothermic endothermic

Which of the following describes a compound? (hint: carbon and oxygen bo a. a piece of pure carbon, containing only carbon atoms b. oxygen gas surrounding a solid piece of carbon c. a substance made of two oxygen atoms for each carbon atom carbon and oxygen atoms mixed without being bonded together

The atomic number, or number, is the described as the number of in the nucleus of an chemical element.