Part B Consider this question posed at the beginning of the task:
Does Earth's gravitational force field act on objects that aren't touching Earth's surface?
Did the investigation answer the question? Explain whether it gave enough evidence to support the idea
that an invisible gravitational force field exists.

- lead + phosphoric acid = hydrogen + lead(ii) phosphate

water and alcohols have similar properties because water molecules contain hydroxyl groups that can form hydrogen bonds with other water molecules and with alcohol molecules, and likewise alcohol molecules can form hydrogen bonds with other alcohol molecules as well as with water.