Answer:
About 203.381 grams
Step-by-step explanation:
We need to first determine the molar mass of Ba3(PO4)2.
We have:
3 Bariums - 137.327*3 = 411.981
2 Potassiums - 39.098*2 = 78.198
8 Oxygens - 16*8 = 128
Add these together and we get 618.179 g/mol
If we only want 0.329 moles, then we multiply those two numbers together to get about 203.381 grams.