an organic compound X which contains only carbon,hydrogen and oxygen has a relative molecular mass of about 98. when 0.43g od X is burnt in excess oxygen,1.159g carbon dioxide and 0.395g of water are formed.
what is the molecular formula of X?
Originally posted by Bigcable22:an organic compound X which contains only carbon,hydrogen and oxygen has a relative molecular mass of about 98. when 0.43g od X is burnt in excess oxygen,1.159g carbon dioxide and 0.395g of water are formed.
what is the molecular formula of X?
Mr of carbon dioxide= 12+16*2=44
Mr of water= 16+1*2=18
no of moles of water formed = mass/Mr = 0.395/18 = 0.21944moles
no of moles of carbon dioxide formed = 1.159/44 = 0.02634moles
no of moles of X = 0.43/98 = 0.004387
ratio of X:carbon dioxide:water
0.004387:0.02634: 0.21944
1: 6:50
think there should be something wrong with the question. ratio should be 1:6:5 (not 50)
X + excess oxygen ---> 6 CO2 + 5H2O
6C needs to be used. 98-6*12=26
10 H
1O
C6H9OH