What mass of lead trioxonitrate (v) that would be required to yield 12gramm of lead chrolde and other addiction of excess sodium chloride solution pb=207 n=14 o=16 Na=23 cl=35•5

Sir show me the work

how many moles of PbCl2 in 12 grams?

What is the balanced equation?
That will tell you how many moles of "lead trioxonitrate" you need.
Convert that back to grams.

and "addiction"????
also, as DrBob222 remarked in another post,

I believe the correct way to write this is lead(II) nitrate. The 2 should be (II) and the 5 is not needed nor is the trioxo. prefix. Nitrate is nitrate in any language and is NO3^-. I saw a post recently about tetraoxosulphate(VI) acid which is a ridiculous way to name H2SO4 or sulfuric acid.