Posted by George Marsh on December 30, 2012 at 05:23:15 from (50.104.202.156):
In Reply to: O/T Chemistry experts posted by Fritz Maurer on December 29, 2012 at 10:00:13:
These are ruff numbers. One liter of air has a mass of 1.2 grams. So if hydrogen weighs nothing, which it doesn't, then for every one liter of hydrogen the ballon has to weigh less than 1.2 grams. Do the math. The volume of a sphere is volume = (4/3) � � � r3.
This is a math, chemistry and a little physics question. Test tomorrow.
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