Yes, but I doubt it is worth the cost. Better and easier to just buy hamsters of one sex.
No it is not possible
No this isn't possible.
Yes, i believe it's possible.
yes
yes it is possible
it is possible the older hamster might eat the baby...i wouldn't try it.
It is possible. a hamster should not be kept with a gerbil. The hamster may also try kill the gerbil if it dislikes it.
To sterilise the water.
Chlorine
its possible but the hamster might get scared
Yes, they can be, but it is extremely difficult to do so- even if you bought a "Hamster Potty!" I have not managed to litter train my hamster, but i do know that it is possible but unlikely.
Only a veterinarian can evaluate the situation, take your hamster as soon as possible.