bataiye gas aam tor per halki hoti hay,kya yeh mumkin hay k koi gas lohay say b 4 gunah zayda bahri hoo,?us ka nam bataiye?
bataiye gas aam tor per halki hoti hay,kya yeh mumkin hay k koi gas lohay say b 4 gunah zayda bahri hoo,?us ka nam bataiye?
tum nay to pher b seekh liye zamne ki chal chalen faraz
hum to kuch b na ker sake mohbaat k siwa
پھر یوں Ûوا Ú©Û’ درد مجھے راس Ø¢ گیا
Radon?
The heaviest gas at room temperature ( 75º F, 293.15º K) is WF6, or Tungsten Hexafluoride (297.83 g/mol, that's almost 10 times heavier than air!). It changes phase (becomes liquid) at 290.25º K, or about 62.78º F.