Răspuns:
560g KOH
390g K; 160g O; 10g H
Explicație:
M(KOH) = A(K) + A(O) + A(H) = 39 + 16 + 1 = 56 g/mol, adică 1 mol de KOH corespunde unei mase de 56 grame.
1 mol KOH.....56g KOH
10 mol KOH.....x g KOH
x = 10 mol × 56g / 1 mol = 560g KOH
56g KOH.....39g K.....16g O.....1g H
560g KOH.....a g K.....b g O.....c g H
a = 560g × 39g / 56g = 390g K
b = 560g × 16g / 56g = 160g O
c = 560g × 1g / 56g = 10g H
-Mihai
