Answer:
Tetrahedral
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The best answer among the choices given that describes compression would be "<span>region of high pressure in a medium caused by a passing wave." The concepts of air compression is widely used in the industries such as vehicle tires, balloons, and other inflatable materials requiring high air pressure.</span>
1.0 mole of gas at STP occupies 22.4 Litres.
4/0L / 22.4 L/mole = 0.179 moles He.
