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mol atom Hidrogen = 12,04 x 10^22 / 6,02 x 10^23
= 2 x 10^-1 mol
2H2O (l) --> 2H2 (g) + O2 (g)
2 : 2 : 1 (perbandingan koefisien)
mol H2O = koefisien H2O / koefisien H2 x mol H2
= 2/2 x 2 x 10^-1
= 2 x 10^-1 mol
Jadi, mol jumlah air adalah 2 x 10^-1 mol