Single replacement because only one letter is being switched out in the reaction
its 40
I just took the test right now to get this answer
the mass of 1 mole of phosphorus atoms is approximately 30
g
hope this helps :)
If ice is warmed and becomes a liquid, the process is endothermic.
The process requires heat in order to proceed. If ice stays in a very cold place, it will not melt unless it's heated. If ice is placed outside where it melts on its own, it gets the heat from the surroundings.
