How much of that energy would be passed on to hawk in the following food chain?

The transfer of energy between trophic levels is typically around 10%. This means that only 10% of the energy available at one trophic level is passed on to the next level. The remaining 90% is lost as heat or to other organisms. Therefore, in the above food chain, the hawk would only receive around 10% of the energy available in the grasshopper.