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which observation would best support that the bond present was a covalent bond?
a) the compound present contains a nonmetal.
b) carbon and oxygen share pairs of valence electrons.
c) aluminum is contained in a compound and forms a cation.
d) the valence electrons are involved in the bonding between atoms.

Who is better, messi or cristiano, i need this for a chemistry class. asap

Does anyone know a lot about how to: - calculate mass of magnesium metal - calculate the actual yield of magnesium oxide - calculate the theoretical yield of mgo - calculate the percent yield of mgo - determine the percent yield of mgo - determine the average percent yield of mgo i had to do an online lab and its asking these questions but i have no idea where to start or how to be able to find these things. i can post the chart of the data from the lab or if you can tell me exactly how i can find each.

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