If I keep my pc on for 17 hours a day, then minimum how much bitcoin may I get per week if I stake 0.05BTC ?
Bitcoin Stack Exchange is a question and answer site for Bitcoin crypto-currency enthusiasts. It only takes a minute to sign up.Sign up to join this community
Bitcoin uses pure PoW (proof of work) mining, so you can't really "stake" your 0.05BTC. The only thing that will determine how much bitcoin you may get, will be your computing power, measured in hashes per second h/s (or kh/s, Mh/s, Gh/s...).
If you solo-mine, finding a block with a PC is like winning the lottery, so chances are you'd never get any bitcoin. To get some, you'd want to join a mining pool, where the winnings are distributed among participants, proportional to their hashrate.
However, note that the era of CPU/GPU mining is long gone, and specialized hardware now exists, multiple times more powerful than your average CPU/GPU (at least when measured in h/s). So, even if you join a pool, with your PC, you can't really get any significant amount of BTC.
There are many sites which can calculate mining profitability for you, one example here.