Distinguish the difference between physical change or chemical change.
Should be C.
3 millimeters is the rock
If it loses an electron, it will become an ion.
The coefficient in a chemical formula represents the amount of each chemical present. The amount of a substance is measured in moles.
You have to think about the fact that hot air is constantly being blown up elevating the balloon once that air is taken away it's up to the steering and the wind after that. I know that probably doesn't help did you want to know the science part?
