Which pair includes two types of pure substances? a. elements and homogeneous mixtures b. heterogeneous mixtures and compounds c. homogeneous mixtures and heterogeneous mixtures d. elements and compounds

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

Which statement describes james chadwick’s discovery.

What is the molar mass of the anhydrous compound? answer using four significant figures. 36.02 g/mol 120.15 g/mol 156.12 g/mol