Can I play Minecraft smoothly with this PC and how many fps can I get?
You hardly see any details, you need more information.
With 16GB Ram and i5 CPU at 2.8Ghz Minecraft should run smoothly (actually over 25FPS). Nobody will be able to give you the exact FPS number here, but if you have a suitable graphics card, there should be no problems.
Since the information you have given is quite reduced, there's not much more to say…
You can play fluently but if you want to play more fluently then here is a tutorial https://link-to.net/117227/FPSboost