what was the pressure in discharge tube used for discovery of cathode rays: 10^-6 atm or 10^-4 atm or 10^-2 atm?​

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.

At stp, which substance is the best conductor of electricity? a. nitrogen b. neon c. sulfur d. silver

Two liquids are poured into a beaker. after a few seconds, the beaker becomes warm. which of the following best describes this reaction? a. an exothermic reaction b. a decomposition reaction c. an endothermic reaction d. a single-displacement reaction