A:W(A+x-n)A mol
B:A(A-x-n)W mol
C:W(A-x-n)A mol
D:W(A+x+n)A mol
Rules are helpful to us, we have to follow them.
(从上到下依次填写)
选择实验用具及药品
用具:试管、铁架台(带铁夹)、单孔橡皮塞、玻璃导管、橡皮管、捣碎的鸡蛋壳。