Question

the atomic mass of Cl is 35.5 . how many times is the atom of chlorine heavier than the carbon atom?

Answer 1

Mass of C = 12 g
Mass of Cl = 35.5 g

$So,\frac{Cl}{C}=\frac{35.5}{12}=2.9$
So, Cl atom is almost 3 times heavier than C atom.