A 10g is too small for Dwarf Neon Rainbows I'm afraid. They're too active and really need over 25-30g long, don't let that "dwarf" in their common name fool you!
Mollies get pretty big too, I personally wouldn't keep those in smaller than 15-20g. Stocking a small 10g is tricky!
http://www.theaquariumwiki.com/10_Gallon