If you were asked to convert 1.3 mol al to atoms, which of the following should you use for the conversion?

a.) 6.022 * 10^23 atoms al/13.0 mol al
b.) 6.022 * 10^23 atoms al/1 mol al
c.) 26.981 atoms al/1 mol al
d.) 13.0 atoms al/1 mol al

that's what i got you can count the number of atoms

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.