Why is the statue of liberty covered with a greenish bluish cover when it should be in brown color as it is made out of copper ?

During chemistry class, carl performed several lab tests on two white solids. the results of three tests are seen in the data table. based on this data, carl has concluded that substance b must have bonds.

The rules of engagement (roe) working group is often used to (select all that apply.)

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.