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V H2 = n x 22,4
n H2 = 1,12 : 22,4 = 0,05 mol
Setarakan persamaan reaksi :
Zn(s) + 2 HCl(aq) => ZnCl2(aq) + H2(g)
Perbandingan nilai koefisien Zn dengan H2 sama, sehingga jumlah mol Zn = H2 = 0,05 mol
Mencari massa Zn
Massa Zn = 0,05 x 65 = 3,25 gram
Kadar ?? Soal perlu di koreksi