• 2022-06-29
    根据反应Sn[img=17x22]1803dd5523845f9.png[/img] + Zn=Sn[img=17x22]1803dd552cbe936.png[/img] + Zn[img=17x22]1803dd5536450b7.png[/img] 构成原电池,其电池符号为( )。
    A: (-)Zn︱Zn[img=17x22]1803dd553f645a0.png[/img](c[img=7x22]1803dd5547a1bc4.png[/img])‖Sn[img=17x22]1803dd554ef2d49.png[/img] (c [img=7x22]1803dd5556ef387.png[/img])︱Sn[img=17x22]1803dd555ed5977.png[/img]( c [img=7x22]1803dd5567a5404.png[/img]) (+)
    B: (-)Zn︱Zn[img=17x22]1803dd553f645a0.png[/img](c[img=7x22]1803dd5547a1bc4.png[/img])‖Sn[img=17x22]1803dd554ef2d49.png[/img] (c [img=7x22]1803dd5556ef387.png[/img])︱Sn[img=17x22]1803dd555ed5977.png[/img]( c [img=7x22]1803dd5567a5404.png[/img]) ︱Pt(+)
    C: (-)(Pt)Zn︱Zn[img=17x22]1803dd553f645a0.png[/img](c[img=7x22]1803dd5547a1bc4.png[/img])‖Sn[img=17x22]1803dd554ef2d49.png[/img] (c [img=7x22]1803dd5556ef387.png[/img]),Sn[img=17x22]1803dd555ed5977.png[/img]( c [img=7x22]1803dd5567a5404.png[/img]) ︱Pt (+)
    D: (-)Zn︱Zn[img=17x22]1803dd553f645a0.png[/img](c[img=7x22]1803dd5547a1bc4.png[/img])‖Sn[img=17x22]1803dd554ef2d49.png[/img] (c [img=7x22]1803dd5556ef387.png[/img]),Sn[img=17x22]1803dd555ed5977.png[/img]( c [img=7x22]1803dd5567a5404.png[/img]) ︱Pt (+)
  • D

    举一反三

    内容

    • 0

      下列溶液中,pH最小的是( )。 A: 0.01mol·L[img=17x22]1803dd4b8e7ba03.png[/img] HCl B: 0.01mol·L[img=17x22]1803dd4b8e7ba03.png[/img] H[img=7x22]1803dd4b9fe0612.png[/img]SO[img=7x22]1803dd4ba82e3c6.png[/img] C: 0.01mol·L[img=17x22]1803dd4b8e7ba03.png[/img] HAc D: 0.01mol·L[img=17x22]1803dd4b8e7ba03.png[/img] H[img=7x22]1803dd4bc4984e5.png[/img]C[img=7x22]1803dd4bcd20ffc.png[/img]O[img=7x22]1803dd4bd56f766.png[/img]

    • 1

      在强酸介质中,肯定能稳定存在的配合物为( )。 A: [Fe(C[img=7x22]1803dd501aaa52c.png[/img]O[img=7x22]1803dd5022da2e6.png[/img])[img=7x22]1803dd502b2da1d.png[/img]][img=17x22]1803dd50334c0d4.png[/img] B: [AgCl[img=7x22]1803dd503c581fc.png[/img]][img=11x21]1803dd50454ea47.png[/img] C: [Co(ONO)[img=7x22]1803dd504ea1b61.png[/img]][img=17x22]1803dd5057852a9.png[/img] D: [AlF[img=7x22]1803dd50601eee1.png[/img]][img=17x22]1803dd506830f27.png[/img]

    • 2

      对于基元反应:NO[img=7x22]1803dd600dab127.png[/img](g)+CO(g)=NO(g)+CO[img=7x22]1803dd600dab127.png[/img](g)其反应速率常数k的单位是( ) A: s[img=17x22]1803dd601f55b7a.png[/img] B: L[img=7x22]1803dd60282205e.png[/img]·mol[img=17x22]1803dd60310e43f.png[/img]·s[img=17x22]1803dd601f55b7a.png[/img] C: mol·L[img=17x22]1803dd601f55b7a.png[/img]·s[img=17x22]1803dd601f55b7a.png[/img] D: L·mol[img=17x22]1803dd601f55b7a.png[/img]·s[img=17x22]1803dd601f55b7a.png[/img]

    • 3

      设总体X的分布律为P(X=0)=θ, P(X=1)=P(X=2)=(1-θ)/2,其中0<θ<1为待估未知参数。设[img=101x23]1802d3c6e1c13c2.png[/img]是简单随机样本。令[img=114x27]1802d3c6e985317.png[/img],[img=17x22]1802d3c6f1a9682.png[/img]为[img=101x23]1802d3c6e1c13c2.png[/img]中0所占的比例, 则以下哪个说法正确的?‍ A: [img=17x22]1802d3c702e42ee.png[/img]比[img=17x22]1802d3c70bb0618.png[/img]更有效 B: [img=17x22]1802d3c70bb0618.png[/img]和[img=17x22]1802d3c702e42ee.png[/img]都是[img=9x19]1802d3c72407a68.png[/img]的相合估计‍ C: [img=17x22]1802d3c70bb0618.png[/img]比[img=17x22]1802d3c702e42ee.png[/img]更有效 D: [img=17x22]1802d3c70bb0618.png[/img]是相合估计, [img=17x22]1802d3c702e42ee.png[/img]不是相合估计 E: [img=17x22]1802d3c70bb0618.png[/img]不是相合估计, [img=17x22]1802d3c702e42ee.png[/img]是相合估计 F: [img=17x22]1802d3c70bb0618.png[/img], [img=17x22]1802d3c702e42ee.png[/img]都不是相合估计 G: [img=242x46]1802d3c7710420a.png[/img]

    • 4

      3. 三阶行列式D=[img=110x71]18039d1f1b55d53.png[/img]= A: 5 B: 17 C: 22 D: 7