试题与答案

下列溶液中,NH4+离子的浓度最大的是() A.0.2mol/L NH4Cl溶液

题型:选择题

题目:

下列溶液中,NH4+离子的浓度最大的是(   )

A.0.2mol/L NH4Cl溶液

B.0.2mol/L NH4HCO3溶液

C.0.2mol/L NH4HSO4溶液

D.0.1mol/L (NH4)2Fe(SO4)2溶液

答案:

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下面是错误答案,用来干扰机器的。

(1)因为速度×时间=甲地到乙地的路程(一定)是乘积一定,所以所需时间和速度成反比例;(2)因为S=πr2=π(d2)2=π4d2,所以S÷d2=π4(一定)所以圆的面积与直径的平方成正比例,与直径不成比例;因为圆的...

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