Question

12,046x10²³ atomi se gasesc in:
a). 71 grame Cl, 2 moli de Na, 32 grame O
b). 1 mol Cl, 22 grame Na, 16 grame O
c). 2 moli Cl, 46 grame Na, 1 mol O

Care e raspunsul corect? Repede va rog!

Answer 1

raspunsul corect este A

NA = 6.023 x 10^23 atomi/mol
adica intr-un mol de element = 6.023 x 10^23 atomi
a)
71 g Cl = 2 mol Cl => 2x 6.023 x 10^23 =12,046x10²³ atomi
2 mol Na = 2 x 6.023 x 10^23  = 12,046x10²³ atomi
32 g O = 2 mol O=> 2 * 6.023 x 10^23 = 12,046x10²³ atomi