Big Supernova

No.10974074 ViewReplyOriginalReport
Say I was to have a star, with a mass of around 500 or so of our sun's mass. When it dies, and it will, how large would the supernova be? Would it even have one, or would the mass of it all skip the outward explosion stage and become a black hole directly?
How would one figure this shit out anyways? Could one figure out the size of the stellar boom for n masses of sun?