Question

cum se face 33? dau coroana pls

Answer 1

PV = m/M ·RT     M = 23·0,082·400/(20·0,82) = 46 g/mol    n = 23/46 = 0,5 moli
nCO2 = 44/44 = 1mol⇒ 1atom de C   mC = 12 g
nH2O = 27/18 = 1,5 moli ⇒ 3 at. H     mH = 3g
mO = 23- (12+3) = 8 g  nO = 8/16 = 0,5 atomi
0,5moli subst.gaz.....contine ......1at.C............3at.H..........0,5 at.O
1 mol ..................................... x = 2...............y=6...............z = 1
C2H6O  (B)