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mol mg = gr/mr
=4,8/24 = 0.2 mol
mol H2 = 1/1x0,2 = 0,2 mol
maka vol stp H2 = molx22,4
= 0,2x22,4 =4,48
n Mg = 4,8/24 = 0,2
Mg habis bereaksi
n H2 = 0,2
V H2 = 0,2 x 22,4 = 4,48 L