What information does the atomic mass of an element provide? a. the sum of electrons and protons in an atom. b. the difference between the number of protons and electrons. c. the number of protons and neutrons in an atom. d. the number of isotopes.

Which part of earth’s surface receives the most direct rays from the sun? a) equator b) ocean c) poles d) mountains

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.

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?