Lol it literally says that he covered the distance in three seconds so I believe it would be three
I believe the answer is C because the first two are mechanical hazards and C mentions plug which is electrical.
When reversing a given reaction, we simply change the sign of the standard enthalpy change value. Therefore, the reaction will become:
H₂O → H₂ + 0.5O₂, ΔH = 286kJ
This is because if a certain amount of energy is released when a reaction occurs, the same amount of energy must be supplied for the reaction to occur in the reverse direction.
