Asked by Anonymous
Evacuated glass ampules is held at 1000 degree C with a perfect vacuum inside.estimate e steady state leak rate per unit area of nitrogen gas into th e ampule.the diffusivity of nitrogen gas is 10^-11 m^2/s.wall thickness of ampule is 0.5 mm.surface concentration of nitrogen on exterior of ampule is 0.9758g/L. Express answer in g/ m^2* s.
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phaysal
the small cup of coppies contain 3.14moles of water molecules how many molecules are present
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