This entirely depends on your gender and your age. Without those two characteristics, it is impossible to tell you what you are supposed to weigh.
105 lbs
It would weigh about 14.3 pounds .
Nothing--in space
100-115
152 pounds
40
125 lbs
A boy that is 4 foot 9 inch should weigh between 30 to 40 kilograms. This is the ideal weight but it varies in most cases.
How much does a 16 foot 12 inch mdf weigh
about 75-86 pounds
117 - 143 lbs.
About 120-133 Pounds