A teacher doing a demonstration added a small piece of magnesium to a test tube, test tube 1, containing 5 mL of dilute hydrochloric acid. To compare the results, the teacher added a piece of zinc to a similar test tube, test tube 2, also containing 5 mL of the same hydrochloric acid. In which test tube was the reaction more vigorous?
Which of the following would not be an indication that a chemical reaction has taken place?
Which of the following statements explains why copper does not react with dilute sulfuric acid?