Răspunsuri

2014-09-29T19:28:06+03:00
40/12 = 3,333
6,666/1 = 6,666
53,33/16 = 3,33
Imparti toate la 3,333 => (CH2O)n
n = 2 =>C2H4O2 => CH3COOH - acid acetic
3 5 3