What happens when zinc carbonate is calcined?

Can someone me with questions 12 and 13 plz.

What shape would a molecule with two bound groups and two lone pairs have?

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