Would extra mass in the crucible cause the mass of oxygen to come out too high or too low

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

The identities of substances are the same before and after which type of change

Which material burns faster? metal aluminum