Sometimes
No, the same amount.
All salt is kosher unless something is added to it to make it not kosher. Like all other seasonings, the specific package must be certified kosher for Passover.
Table salt and kosher salt are both 39% sodium by weight.
The percentage of sodium is 39,666 % in NaCl.
No, they are equivalent.
Yes.
Difference in style, seasonings and kosher supervision.
Kosher salt is sodium chloride.
Margarine doesn't contain gelatin, even then, it is not kosher unless it is certified kosher.
Kosher salt is the same as table salt, just larger granules. Sea salt has less sodium than table salt as the mineral makeup is different.
Kosher salt is the ionic compound sodium chloride, which is formed by ionic bonding.
This is impossible to answer, but the salt content in all kosher meat is significant.