Answers

2015-10-15T14:32:02+05:30
Volume at 273 degree C and 380 mm of Hg pressure = 11 l
volume at 273 degree C and 750 mm of Hg pressure = x l

P1V1 = P2V2
380*11 = 760*x
x = 380*11/750 = 5.6 liters
volume at stp = 5.6ltrs

no.of moles = 22.4/5.6 = 0.25 moles
1 mole of ethylene uses = 3 mole of oxygen
0.25 mole of ethylene uses = 3*0.25 = 0.75 mole of oxygen

Volume if 0.75 mole oxygen at stp = 0.75*22.4 = 16.8 litres
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