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At STP (Standard Temperature and Pressure), 1 mole of any ideal gas occupies 22.4 L. To find the moles of neon in 14.3 L, we can set up a proportion:
(1 mole / 22.4 L) = (x moles / 14.3 L)
Solving for x:
x = (1 mole
14.3 L) / 22.4 L = 0.638 moles
Therefore, 0.638 moles of neon occupy a volume of 14.3 L at STP.