【简答题】A.Because they want to retum to the job market. B.Because they want to leam something new. C.Because they want to make up for the education they missed. D.Because they want to prove themselves to be u...
【简答题】Na 2 O 2 曾经是潜水艇或航天器中最理想的供氧剂。下表是人体呼出气体的成分(均为体积百分含最)。 空气 成分 人体呼出 气体成分 N 2 78% 74% O 2 21% 16% H 2 O 0. 5% 6% CO 2 0. 03% 4% (1)已知一个人一天大约要产生16 mol CO 2 。若全部被Na 2 O 2 吸收,需要Na 2 O 2 ________ g。 (2)若要使被吸收的C...