Find the number of moles for the following: 4.96 x 1024 of Lead

All of the following are part of the biosphere except

Which of the following contributes to the structural rigidity of cellulose? adjacent glucose polymers are stabilized by hydrogen bonding. glucose residues are joined by (α1→4) linkages. cellulose is a highly branched molecule. the conformation of the glucose polymer is a coiled structure.

Elements in group 2 are all called alkaline earth metals. what is most similar about the alkaline earth metals?