The atomic mass unit is based on which element?

An atom of which element reacts with an atom of hydrogen to form a bond with the greatest degree of polarity ?

Increasing the substrate concentration in an enzymatic reaction could overcome which of the following? a) the need for a coenzymeb) allosteric inhibitionc) competitive inhibitiond) insufficient cofactors

Which of the following is a physical property flammability heat of combustion solubility and toxicity