Answer is <span>C: It's appearance changed.</span>
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.
The number of protons would be equivalent to the number of electrons if the net charge on the atom is 0.
Answer:
The substance is a mixture because it left a white powder in the beaker when boiled.
Explanation:
