Answer:
Sodium sulfide is the chemical compound with the formula Na 2 S, or more commonly its hydrate Na 2 S·9H 2 O. Both are colorless water-soluble salts that give strongly alkaline solutions. When exposed to moist air, Na 2 S and its hydrates emit hydrogen sulfide , which smells like rotten eggs.
I'm not sure if it's right but it's a guess because of the 2Na.
Hello! Your answer will be C. If you need an explanation let me know!
Here is some different pics of a water table. I hope this is what you are looking for :). You can click the pictures to in large them.
