Assign an oxidation number to each element in the reaction.

CaF2(s) + H2SO4(aq) → CaSO4(aq) + 2HF(g)

How does the atmosphere to make earth livable? check all that apply. causes the seasons contains oxygen provides warmth creates important nutrients blocks harmful energy from the sun plz like !

What if it is did darwin used to support his theory of evolution

Atoms contain subatomic particles called protons and neutrons. when these protons and neutrons spilt, a lot of energy is released