Question

7.00 g of a certain Compound X, known to be made of carbon, hydrogen and perhaps oxygen, and to have a molecular molar mass of 70. g/mol, is burned completely in excess oxygen, and the mass of the products carefully measured: mass product carbon dioxide 22.01 g water 9.01 g Use this information to find the molecular formula of X, x 6 ?

Answer 1

00 322 Ans) Maud of oxygen that is consumed in gxn. ' - mauld of peoduet - (mass ofereix compound x) = (22.01 +9.01) - (7) 31002-7 = 240029 mass gool 24002 22001 un 18 32 005 0.5 005 - Cx Hy O + O XCO2 & 4 H2O 24.02 22.01 29.01 moles 24002 2.200 9108 moles 0.75 sco. moles of thony 005 ; Y= 1 moles of H20 CO2 = x=0.5; X = % moles of oopgen = z +0.75 = 2x6005) + 4 (0:1) Put X=0.5, y = 1 2+0.75 = 2 (0.5)2 + oor 2= 0.5+005 - 0.75 = 0

We have y=1 x = 0.556 2=0 Imperical Mäleidann foumelaz CyH, O. = CH2 height= 1281 + 2X2 = Ag. n= molore mass weight = = 5 70g 149 molecular formula = 5(Che) = 15410 Thank you, May it help you.