Willia - Please disregard the previous posters - I certainly don't believe this is a common sense question with a 'search' function answer and don't believe I have read post on this question previously...I certainly don't know the answer...
In general, however, reptile hatchy weights are somewhat variable and often dependant on clutch size etc - another example, one egg may hold twins, in which case they are often roughly half the weight of an egg holding a single baby...
There are likely a few turtle guys who might be able to answer this question a little better (try PM'ing MrDestiny) but if it is a young hatchling I wouldn't be concerned about it's weight either way...