notam compusul
(CH2O)n, are 24 atomi in molecula
=> n+2n+n = 24 => n = 6
C6H12O6, glucoza
miu.C6H12O6 = 180 g/mol
180 g ...................... 6x16 g O
3,6 g ....................... m = 1,92 g O
=>
18 g H2O .................. 16 g O
x g ............................ 1,92 g O
= 2,16 g H2O