Ageologist tests a rock containing calcium oxide by reacting it with hydrochloric acid. water and calcium chloride form. what bonds break?

Which process does not require the presence of a physical substance in order to transfer heat? air in the atmosphere is heated by the ground. this warm air then rises, and cooler air falls. this is an example of what type of process? how is conduction different from radiation?

If two objects at different te, peraure are in contact with each other what happens to their temperature

Which change to the system wood cause the freely-moving piston to lower?