在2L容器中,放入0.4molA和0.6molB,在一定温度下,压强为P,发生反

题型:计算题

问题:

在2L容器中,放入0.4molA和0.6molB,在一定温度下,压强为P,发生反应:2A(g)+3B(g) x C(g)+2D(g),在10min后,容器中c(A)="0.1" mol·L1

(1)若温度与压强均未改变,求v(B)

(2)若温度不变,压强变为0.9P,求n(D)和x 的值

考点:化学平衡的有关计算影响化学平衡的因素达到化学平衡的标志化学平衡常数
题型:计算题

When the rate of inflation exceeds the rate of return on the most profitable investment available, the difference between those two rates will be the percentage by which, at a minimum, the value of any investment will decline. If in such a circumstance the value of a particular investment declines by more than that percentage, it must be true that______.
Which one of the following logically completes the argument

A.the rate of inflation has risen

B.the investment in question is becoming less profitable

C.the investment in question is less profitable than the most profitable investment available

D.the rate of return on the most profitable investment available has declined

E.(E) there has been a chance in which particular investment happens to be the most profitable available

题型:计算题

揭开国共两党由内战到和平、由分裂对峙到合作抗日序幕的事件是

A《八一宣言》的发表 B 西安事变的和平解决

C 日本发动“七七事变” D抗日民族统一战线建立

题型:计算题

下述表述正确的是()。

A、吊钩是通用取物装置

B、吊环是通用取物装置

C、抓斗是专用取物装置

D、起重电磁铁是专用取物装置

题型:计算题

基于某种特定的标准,来评价学生对与教学密切关联的具体知识和技能的掌握程度的评价方式称为______。

A.常模参照评价
B.正式评价
C.标准参照评价
D.非正式评价

题型:计算题

阴囊包块,透光试验阴性,平卧后消失,多见于()

A.睾丸鞘膜积液

B.精索鞘膜积液

C.交通性鞘膜积液

D.腹股沟斜疝

E.睾丸肿瘤

更多题库