The two substances are rock (molten and solid) and metal (solid + liquid).
Layers of the earth from the outside in:
1. crust. hard rock/dirt/ground. Shell
2. mantle. melted rock and stuff. Egg white
3. core. Outer core - liquid. Inner core- solid. Nickle and iron. Yolk
It’s called a branch point, represents where a single lineage evolved into a distinct new one.
Answer:
The answer to your question is below
Explanation:
Balance the following equation
1 N₂ + 3 F₂ ⇒ 2 NF₃
2 - N - 2
6 - F - 6
