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A flask

 of 0.3 litre capacity was weight and after it has been ever created it was then filled with a gas off on molecular mass 1.0 mm pressure and temperature of 300 Kelvin the increase in mass of the flies quote 0.97 7 gram calculate the molecular mass of the gas
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{\displaystyle \ pV=nRT}

  •  p:pressur of gas 
  •  V:volume of gas
  •  n: moles numbers of gas
  •  R:constant
  • T: absolute temperature

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