1 mol apa...........18 g apa
x mmoli apa........720 mg apa x = 40 mmoli apa
nr moli=masa/masa molara = 320/64=5 moli
1 mol SO2.........6,022 * 10 la 23 atomi
5 moli SO2...................x atomi x = 30,11 * 10 la 23 atomi
nr moli amestec = 5+2 = 7 moli
V total = nr moli * V c.n = 7*22,4 = 156,8 l