19. O, and O. (ozone) are allotropes of oxygen. Buckminsterfullerene (C) is another allotrope of carbon. Based on these statements and the information in Model 4, propose a definition for
allotrope

What is the ph of a solution with a 1.50 × 10−9 m hydroxide ion concentration?

Jessica is traveling from miami, florida, to chicago, illinois. using the map, tell one way the land will change during the second half of her trip.

Which conclusion fits the data in the table? a. heat chemically changes chocolate and margarine. b. all solids become liquid at 100°f. c. removing heat from a substance it to melt. d. matter may change shape when it is heated.