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V H2 = 10 liter
mol H2 = 10 liter / 22,4 liter/mol = 0,45 mol
perbandingan koefisien reaksi Al : H2SO4 : H2 = 2 : 3 : 3
mol Al = 2/3 x mol H2
mol Al = 2/3 x 0,45 mol = 0,3 mol
massa Al = 0,3 mol x 27 gr/mol = 8,1 gram
mol H2SO4 = 3/3 x mol H2
mol H2SO4 = 3/3 x 0,45 mol = 0,45 mol
V H2SO4 0,5 M = 0,45 mol / 0,5 mol/liter = 0,9 liter = 900 ml