What do scientists consider air, temperature ans water to be in the environment

Which statement is best described as a atom

Which is an example of the practical pursuit of alchemy? a. forming perfect substances. b. transforming base metals. c. developing metalworking techniques. d. linking spiritual characteristics with material substances.

If 3 moles of a compound use 24 j of energy in a reaction, what is the a hreaction in j/mol?