>>13
① 4/16 = 0.25 mol
② 44*0.2 = 8.8 g
③ 1.2*10^23/(6*10^23) = 0.2 mol
④ (56/28)*6*10^23 = 1.2*10^34 個
⑤ 22.4*0.4 = 8.96 ℓ