# Exactly 1 mol of Pb(ClO_2)_2 contains how many moles of Pb, Cl, and O?

$1$ $m o l$ $P b {\left(C l {O}_{2}\right)}_{2}$ contains $1$ $m o l$ $P b$, $2$ $m o l$ $C l$, and $4$ $m o l$ $O$.
A mole of stuff of course contains $6.022 \times {10}^{23}$ indvidual items of that stuff. You specified lead chlorite, whose formula is as written. If you specified how many dozen $P b$, $C l$ etc. atoms there were in a dozen molecules of lead chlorite, my answer would have been the same.
What is the mass of $1$ $m o l$ $P b {\left(C l {O}_{2}\right)}_{2}$??