化學化學化學問題

1.An element with the electron configuration [noble gas] ns2(n-1)d8 has ______valence electrons.A.2B.6C.8D.10E.none of these choice is correct2.A radio wave has a frequency of 8.6x10八次方Hz.What is the energy of one photon of this radiation?_______3.Infrared radiation from the sun has a wavelength of 6200nm.Calculate the energy of one photon of that radiation_____4.Hydrochloric acid is prepared by bubbling hydrogen chloride gas through water.What is the concentration of a solution prepared by dissolving 225L of HCL(g) at 37C and 89.6KPa in 5.25 L of water?A.1.49M B.1.66M C.7.82M D.12.5M E.16.6M
1. (A) 2. 過渡金屬的價電子數請參考:http://dl.clackamas.cc.or.us/ch104-06/valence_electrons.htm2. E=hv

h=6.626*10-34 Js

v=8.6*108 s-1

E=5.7*10-25 J.3. E=hc/l

c=光速=3*108 m/s

l=6200 nm=6.2*10-6 m

E=6.626*10-34*3*108/6.2*10-6=3.2*10-20 J.4. 在89.6kPa

37oC下

225L的HCl有 n=PV/RT=89.6*225/8.3144/(273 37)=7.82 mol

溶於5.25L水中

濃度為 7.82/5.25=1.49 M

Ans. (A).

ground-state electron configuration,什麼是electron configuration,electron configuration of atoms,noble gas electron configuration,valence electron configurationelectron configuration,noble gas,photon,radio wave,hydrogen chloride,the energy,frequency,HCL,ns2,d8

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