Răspunsuri

2014-11-15T16:57:21+02:00
M(C) = m(subst) * w(C) ; m(C) = 100 * 0,75 g = 75 g m(H) = m(subst) * w(H) ; m(H) = 100 * 0,25 g = 25 g 
  • CH4
  • Ambiţios
2014-11-15T18:32:17+02:00
% O = 100 - 53,33 - 11,11 = 35,56
53,33/12 = 4,44
11,11/1 = 11,11
35,56/16 = 2,22
Imparti toate la 2,22 => FB = C2H5O
masa moleculara pt FB = 2*12+5+16 = 45
masa moleculara pt FM = (2*12+5+16)*n = 90 =>45n=90=>n=2
FM = C4H10O2 - formula moleculara a compusului organic
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