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(a)2500 "cm"^3 of hydrogen is taken at S...

(a)`2500 "cm"^3` of hydrogen is taken at STP. The pressure of this gas is further increased by two and a half times (temperature remaining constant). What volume will hydrogen occupy now?
(b)Taking the volume of hydrogen as calculated in the question (a), what change must be made in Kelvin (absolute) temperature to return the volume to `2500 "cm"^3` (pressure remaining constant)?

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`5000/7 cm^3`
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