6.02 x 10^23 atoms of an element have a mass in grams equivalent to the mass of of the atoms in amu.
a) 1x 10-23
b) 1
c) 6.02
d) 1 x 1023

answer; i believe that the correct answer is (a); a large rock being weathered by wind and rain;

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.