OK big. I assume you mixed the powder with all 10 mls of water that Gonakor comes with. Right? Make sure because you don't want to f'up knowing how much hcg you are taking. Now, I assume you are using regular 23 or so gauge pins and not insulin pins, or am I wrong? If this is the case here is what you do...
With a typical IM syringe (say 23 gauge) if you mixed all the water (10ml) than the concentration would be 250IU per ml. In that case you would need to draw up 2cc's on a regular syringe to inject 500IU.
If you have insulin pins than you will need to inject two full insulin pins and another that is half full to get 500IU.
I believe the best way to take this brand of hcg is to mix the powder with only 2.5 mls of water. That way, you can inject 500IU in the belly fat by drawing up to half way (.5ml) with a slin pin.