A small rock sitting on top of a big rock and a stretched rubber band.
answered: Guest
oxygen, selenium, tellurium, and polonium.
they're all from the same group as sulfur (group 16).
answered: Guest
a 20-cm-long, cylindrical graphite (pure carbon) rod is inserted into an oxidizing atmosphere at 1145 k and 1.013 x 105 pa pressure. the oxidizing process is limited by the diffu- sion of oxygen counterflow to the carbon monoxide that is formed on the cylindrical surface.