Someone pls help me. Even if u can’t answer all of them, that’s fine, just pls help

This image is an example of a(n) a) atom. b) compound. c) mixture. d) molecule.

How many atoms are there in 5.70 mol of mg

What method(s) do plants use to obtain nitrogen? select all that apply. absorb it from the atmosphere use bacteria to convert nitrogen to usable form obtain usable nitrogen compounds from the soil absorb nitrogen from water taken in at the roots