Who is the intended audience?

How many miles of water are produced if 5.43 mol pbo2 are consumed

Stage in which a typical star has completely stopped fusion

The comparison of the number of atoms in a copper coin the size of a penny with the number of people on earth is made to illustrate which of the following? a. that atoms are indivisible b. that atoms are very small c. that atoms are very large d. that in a copper penny, there is one atom for every person on earth