



Thời gian làm bài : 90 phút
 !"

 
Cho: hằng số Plăng h = 6,625.10
-34
J.s, tốc độ ánh sáng trong chân không c = 3.10
8
m/s;
!"#
$% &'$( )
*
+
=
độ lớn điện tích nguyên tố e = 1,6.10
-19
C; số A-vô-ga-đrô N
A
= 6,023.10
23
mol
-1
.
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max x
x x x x x x
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