- How long can a single atom exist?

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What is the molality of a solution when 1 mole of NaCl is dissolved in 250 ml of water? Which set of parametric equations represents the function y=x^2+3x-4? A candle burns in a 6 ft by 2 ft box. How long until the oxygen runs out in the box? (air is not all O2) (C18H38 is what is burning in the? Write a proof to show that the diagonals of a parallelogram bisect one another? Problem with pressure/lack of support at work?