In the Eqn: [3 Fe + 2 O2 → Fe3O4], How many f. u.s of Fe3O4 will be produced from 285 g of Fe with an excess of Oxygen gas?

Melting and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.

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

Is this correct if not can u correct me