What is the standard enthalpy change for the conversion of one mole of hematite (Fe2O3) to magnetite (Fe3O4) and oxygen gas

Which is the layer underground where all empty spaces are filled with a combination of air and water ?

Each pair of clay balls represents to planetesimals if each plane test molluscum pound of the same material and is separated by the same distance which pair experiences the greatest gravitational attraction

Which are examples of how technology has advanced scientific understanding.1using hot water to sterilize medical equipment.2transplanting a human organ into another individual.3inserting genes from one sheep into another cell to make a cloneunderstanding the different structures that make up a cell.4examining microorganisms from the deepest parts of the ocean