Hello, I am stuck in the tomb of nago sadow where the is room that is..

Assume you're facing the the pool. Turn around, then turn LEFT when you get to a fork in the road. You should come to a room with two terentatek in it. Turning right will put you into a room with three pillars with energy rings. Kill the terentatek, then go into the next room. There should be a "Pillar of Fire" and a "Pillar of Ice." They contain special grenades, Fire and Ice ones. Get them, and go back to the acid pool. Use the Ice grenade, as the Fire one will create toxic gases. You can now walk over the pool. Bravo.

Face the pool. Turn around, and turn left when you get to the fork in the road (turning right won't take you to anything important). You should come to a room with two terentatek therein. If you're feeling confident, kill them; or you can be a coward (like me) and open the door with the lever then run in (the monsters can't come in for some reason). Anyway, inside this room there are two pillars: Fire and Ice. They contain special grenades. Grab them, then go back to the acid pool. Use the Special Cold Grenade to freeze the acid (if you use the fire one it'll create some toxic gases and you'll die instantly). Now you can walk over the pool. Bravo.

You can do it.

You were supposed to have gotten a fire grenade and an ice grenade elsewhere in the tomb. You then click on the acid pool and it will have the option of throwing either the fire or ice grenade and you must throw the ice one and the pool will become frozen.
Hope I Helped!!!

You have to go the rights side of the tomb sneak past the big monsters than on the right side of the room there will be a switch.Pull it than walk into the room you opened take the gernades out than run out the door.Then go to the acid pool throw the special cold gernade across then you can walk across get the starmap and the lightsaber.You will have to kill either Uthar or Yathura after that.Depends if your lights or dark.