How many times is a carbon atom lighter than a silver atom?

Answer: A carbon atom is 9 times lighter than a silver atom.
Explanation of problem solving: in order to solve this problem, it is necessary to know how much the atom of each presented element weighs. For this, we will use the periodic system of chemical elements of D.I.Mendeleev. The atomic mass of each element in it is presented for 1 mole of a substance:
for carbon: Ar (C) = 12;
for silver: Ar (Ag) = 108.
To find out how much lighter a carbon atom is, you need to divide the atomic mass of silver by the atomic mass of carbon:
Ar (Ag) / Ar (C) = 108/12 = 9.