Hai sa-ti expic cum se calculeaza
Calculezi masa moleculara : 56g
Apoi folosesti regula de 3 simpla :
56 g KOH.....39 g K.....16 g O.....1 g H
100 g KOH.....x g K.....y g O.....z g H
x=100x39/56
y=100x16/56
z=100/56
Cand faci impartirile ia de la numar doar doua cifre dupa virgula si pui procent