Fe & O makes an ionic bond because of this
Metal and Metal = Metallic
Non-Metal and Metal = Ionic
Non-Metal and Non-Metal = Covalent
In this case Oxygen (O) is a Non-Metal and Iron (Fe) is a Metal so you have an Ionic Bond
The two types of energy given off is light and heat energy. when you turn on a light bulb you see the light emitted and you can feel the heat.
I say it’s 9 moles , hope this is right
It must be freezing or condensation