What is true of carbon atoms? a)they are not found in living organisms. b)they have five valence electrons. c)they can form up to four covalent bonds. d)they do not bond with other elements.

When a septic tank backs up a goes in to clean it out

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.

Voltaic cells produce a positive overall charge. what does this indicate? a. the reaction is likely to be endothermic. b. the reaction is spontaneous. c. the reaction is not likely to occur. d. the reaction is not spontaneous.