Question

chimie clasa a x a sociale rapid va rog.​

Answer 1

1)

  p       t     s        t         s      p

H3C---CH--CH2--CH---CH2--CH3

           I                 I

          CH3           CH3

         p                p

p = primar, s = secundar, t = tertiar

catena saturata ramificata

Fm. = C8H18

M.C8H18 = 8x12 + 18x1 = 114 g/mol

114g ............................ 8x1 g H

100% ......................... a% = 7,02% H

2)

a.

d.aer = miu.compus/miu.aer, miu.aer = 28,9 g/mol

=> miu.compus = d.aerxmiu.aer = 2,4913x28,9 = 72 g/mol

100% compus - 66,66% C - 11,11% H = 22,23% O

notam compusul CaHbOc,

avem 12ag C + b g H + 16c g O

100% ........... 66,66% C .............. 11,11% H ............... 22,23% O

72g .............. 12a g C ............... b g H ........................ 16c g O

=> a = 4, b = 8 si c = 1

=> Fm = C4H8O

b.

raport de masa:

C: H: O: = 4x12: 8x1: 16 = 48: 8: 16 /:8

=> C: H: O: = 6: 1: 2