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Ar O = 16
Ar X = .......?
Penyelesaian :
Jumlah O x Ar O
%O = _______________ x 100%
Mr senyawa
2 x 16
40% = _______________ x 100%
Mr senyawa
32
0,4 = ____________
Mr senyawa
Mr senyawa = 32/0,4
Mr senyawa = 80
Mr senyawa = (Ar O x 2) + Ar X
80 = (16 x 2) + Ar X
80 = 32 + Ar X
Ar X = 80 - 32
Ar X = 48
Jadi, Ar X adalah 48