Smelting of iron ore involves a) oxidizing iron to ferric oxide and then adding silicon and boron b) dissolving the ore in hot water to separate iron and aluminum c) heating beyond iron's melting point and combining the material with carbon d) crushing and heating the ore at its melting point e) washing the ore with acid to extract iron.

C3h8o3 - glycerol major species present when dissolved in water

Select the correct value for the indicated bond angle in each of the compounds. o−o−oo−o−o angle of o3 90° 109.5° < 109.5° 120° < 120° 180° f−b−ff−b−f angle of bf3 180° < 109.5° < 120° 120° 109.5° 90° f−o−ff−o−f angle of of2 < 120° 120° 90° 109.5° 180° < 109.5° cl−be−clcl−be−cl angle of becl2 90° 109.5° 180° 120° < 109.5° < 120° f−p−ff−p−f angle of pf3 90° 109.5° < 109.5° 180° 120° < 120° h−c−hh−c−h angle of ch4 90° < 109.5° 180° 120° < 120° 109.5°

The empirical formula of a compound is ch2o and its mass is 120 amu/molecule, what is its formula?