If you always think what you've always thought, you will always do what you've always done. If you always do what you've always done, you will always get what you've always got. If you always get...
Since hydrogen has an n-factor of 1, its no. of moles and equivalents are same. 0.1 moles 36.5/10 = 3.65 g of HCl. Add 3.65g of HCl to 1 litre of water to get 0.1M or 0.1N solution of HCl.
Hey, so this is an educated guess. The word light, written in black(or darkly). But that seems too simple, so it probably actually is a play on words: Light as in not heavy, likely a raven or crow...