Answer:
b
Explanation:
A pure substance has a constant composition and cannot be separated into simpler substances by physical means. There are two types of pure substances: elements and compounds.
Melting is a process where a solid such as ice turns into liquid or water. The molecules of ice slowly moves and becomes unstable as they gain energy. As this energy builds up, kinetic energy increases and the intermolecular forces react because of this energy.Thank you for your question. Please don't hesitate to ask in Brainly your queries.
Answer:
I don't really know what that is so here is a picture of it
Explanation:
How much it has to drop and how heavy it is. Hope this is what you're looking for:)
you calculate all the letters together and it would be Zn2
