As mentioned previously, reflow soldering.however hand soldering is possible.
Using a very fine strand of flux core solder, first pass over where you will solder the tiny chip to with a wiping motion, the solder should flow onto only the pads with no bridging if you do it right.
Then, lay the chip in position, add a tiny amount of solder and tap it with hot soldering iron.
If you find the iron tip too hard to work with because it's too big, there should be a screw on the side that is used to hold interchangeable tips, you can unscrew this a small amount, wrap a length of copper wire around it and retighten it. Now you have a very small tip for precision soldering.