figure out how many moles of each you have.
Then, multiply the moles of silver phosphate by three. Do you have that much or more of silver nitrate? If so, you have silver nitrate in excess, and the limiting reqeant is sodum phosphate. If the reverse is true, then silver nitrate is the limiting reqeant.
silver phosphate is produced this way, pick the limiting regeant. If it is sodum phosphat, you get the same number of moles of silver phosphate. If silver nitrate is the limiting reageant, then you get 1/3 of thos moles.
do the steps I outlined, in order.
Moles silver nitrate
moles sodum phosphate.
which is the moles silver phosphate greater than 3x moles silver nitrate?
then product will be ? same/or 3x?
I will be happy to critique your work.