Which statement correctly describes compounds? (Please Hurry) Compounds cannot be broken down into simpler substances by chemical means.
Each compound is composed of one type of molecule.
Compounds can be broken down into simpler substances by physical means.
Each compound is composed of one type of 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.

What is the value of the standard enthalpy of formation of an element in its most stable form?

Which of your 24 wells had indications that a chemical reaction occurred? how were you able to tell that a chemical reaction occurred? which of your 24 wells had indications that a physical reaction occurred? how were you able to tell that a physical reaction occurred? report on both mixing and evaporation. make a general statement about whether your hypotheses were validated or rejected. must your hypotheses be correct for this to be a successful laboratory?