Jawabanmu

2014-05-26T22:51:33+07:00
Diket :
X2
m = 12,8 gram
n = 2,408 x 10 pgkt 23
ditnya : Ar?
jwb :
n = m / Mr
2,408 x 10 pgkt 23 = 12,8 / Mr
Mr = 12,8 / 2,408 x 10 pgkt 23
Mr = 5,3156 x 10 pgkt -23

Krn Mr X2 = 5,3156 x 10 pgkt -23 = 53,156 x 10 pgkt -24
maka
Ar = Mr / 2
Ar = 53,156 x 10 pgkt -24 / 2
Ar = 26,578

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