Natural selection requires variation between individuals. Mutations and reproduction increase genetic variation in a population. Natural selection occurs when environmental pressures favor certain traits that are passed on to offspring.
The answer is 4 mol HCl. See my worked solution attached.
There are a few that look like fluffy heaps of cotton. The ones I would assume you're talking about are Cumulus clouds.
Clouds on the ground are called fog.
It’s put an heat ✦ and pressure pointing from metamorphic rocks to igneous rocks
Answer:
oxygen ion O2-
Explanation:
because it has 8 protons and gave gained 2 electron so O2-.