You are left with a chloride ion, so you started off with a chlorine atom.
Cl + e- → Cl-
3.11 i'm not sure about measurements maybe like 3.11kg/cm^3
Answer:
Soil provides nutrients, water, and minerals for plants and trees, stores carbon, and is home to billions of insects, small animals, bacteria, and many other microorganisms.
Should be 18, well i guess I have to have 20 characters so good luck