1.62 lbs per sqft
A half inch thick tempered glass will weigh 6.75 lb/ft2. With that much thickness, it can support much of the weight of possibly a small child or small animal.
What size is it, width, length and thickness
many variables such as thickness that could effect the weight
Glass weighs 162 pounds per cubic foot. Tempering adds no weight. Glass is glass, except specialty glasses like high temperature glass, which weighs slightly more.
How much a beaker weighs depends on the size of the beaker and the thickness of the glass. A small beaker might weigh a few ounces while a large beaker will weigh several times that.
the amount something weighs, depends on the volume of it you have and how dense it is. Though glass will have a fairly consistent density, in your question you only mention the thickness, if that glass were to cover an area of 50 square miles it would weigh more than if it only covered an area of 10 square millimetres.
3.5grams
Depends on the material of that fiber glass weigh.
Theoretically, yes, if it's a big glass of water. Water weighs approximately 8 pounds per gallon. A gallon is 128 ounces, so one eighth of 128 (16 ounces) would weigh a pound.
.7
its glass. are you stupid?
You are an idiot for needing to ask.