Sodium chloride can be formed by the reaction of sodium metal and chlorine gas. If 45.98g of sodium combines with an excess of chlorine gas to form 116.89g sodium chloride, what mass of chlorine gas is used in the reaction?

Protein and polypeptide sequences can be determined by first partially hydrolyzing the protein or polypeptide followed by amino acid sequencing of the fragment pieces using the chemical degradation process known as edman degradation. determine the sequence of the initial (18-amino acid) polypeptide that produces the following five partial sequences after hydrolysis and edman degradation.