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Answer this please fast fast faaaaaaaaaaaaaaast |
| Answer» LET the formula of the hydrocarbon isCnHm(see attachment) Then total weight of 1mole this hydrocarbon is(12n + m) gmNow we know 1 mole GAS takes 22.4 litres (NTP) of volume. Here weight of 1 litre =2.68 gmSo weight of 1 mole =22.4* 2.68=60 gmThus we get { (12n +m) = 60}............ (1) Now the hydrocarbon contains 80% carbon which MEANS Weight of carbon/total molecular weight =80%Or, n=(80*60)/(100*12) = 4From equation (1)m=60 - 12n = 60- 12*4 =12So the formula is ( C4H12) | |