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Kinetic molecular theory


The diagram below represents three samples of He(g) in identical rigid containers. The lengths of the arrows indicate the speeds of the atoms in each sample.
Three boxes contain dots with arrows pointing in random directions. Each dot has an arrow with varying lengths. Box 1 contains 4 dots; 2 with medium length arrows and 2 with relatively short arrows. Box 2 contains 6 dots; 3 with relatively long arrows, 2 with medium length arrows and 1 with a short arrow. Box 3 contains 6 dots with 3 medium length and 3 relatively short arrows.
Based on the diagram, the pressure of the He(g) is
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