The numbers in front of the chemical formulas are called? 2 H2 + O2 --> 2 H20

Which diagram shows the correct way to represent an ionic compound of magnesium oxide?

Which of these is not an example of chemical weathering? a. iron-rich mineral rusting b. feldspar turning into clay c. limestone reacting with acid d. granite breaking up into sand

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.