While many species of hermit crabs are terrestrial, their larval forms are not. Many terrestrial species carry their fertilized eggs around on their abdomen on dry land. But when it comes time for the eggs to hatch, they must travel to the ocean where the salt water acts as a signal to the eggs to hatch. The larva then swim off, and only return to land once they have fully developed.
Hermit crabs lay eggs in the ocean.
Actually, you can't make your crabs have babies in captivity, they can only reproduce in the wild because they lay their eggs in the ocean.
Hermit crabs cant breed in captivity, they need to have an ocean to lay the eggs in and even scientists cant breed them.
Hermit crabs lay their eggs in the ocean and the babies live there until around week 6 when they emerge onto dry land and take up their first shell.
so when the eggs hatch the baby hermit crabs know where to get the water so they can have it in their shells to breathe.
Zero. Hermit crabs lay eggs.
Hermit crabs are hatched from eggs, therefore there is no parental figure for the baby hermit crabs. Once the mother lays her eggs, she moves on (similar to turtles).
about 30 to50 eggs
Yes land hermit crabs do lay eggs if you suppose to have a sot of digged up spot in the tank check for a egg but watch out if you touch the egg the mother will not sense that the egg is hers and hermit crabs carry a disease called salmonella so do not touch 
No, unfortunately they can't... Hermit crabs lay their eggs in the ocean, they are born without shells, and eat plankton. If you have a very large aquarium, and can manage to make a mini-saltwater ocean inside as well as dry land, it could be possible... Remember that the ocean must have a proper amount of salt! (table salt is harmful to hermit crabs too...)
It is very unlikely that a hermit crab will lay eggs in captivity, and if it does lay eggs, the eggs will die right away, they need special cells that only live in the ocean, that we can not provide in captivity.
It won't. Hermit crabs don't get pregnant. They lay eggs. They need ocean and beach conditions to do it, so they do not reproduce as pets.