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2,8 = n . 22,4
n= 0,125 mol
Massa= n . Mr
4,25 = 0,125 . Mr
Mr= 34 gram/mol
m = 4,25 gram
V = 2,8 Liter
Dit :
Ar X = .............?
Penyelesaian :
* Mencari mol
mol = Volume/STP
mol = 2,8/22,4
mol = 0,125 mol
* Mencari Ar
Ar = massa/mol
Ar = 4,25/0,125
Ar = 34
Jadi, Ar gas X adalah 34