What type of change produced the rust shown above? a. chemical, because a new substance with new properties was formed b. physical, because a new substance with new properties was formed c. physical, because the chemical makeup of the metal did not change d. chemical, because the chemical makeup of the metal did not change

Which of the following statements about acidic water is true? a. acid has no effect on the h,o molecules. b. the solution contains a larger number of oh ions than h,o ions. c. the solution contains a larger number of h,o ions than qh ions. d. the solution contains an equal number of h,o ions and oh ions. none of the above e.

How are isotopes of the same chemical element alike? how are they different?

Ahypothesis must be testable and falsifiable to be considered scientific a. trueb. false