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2014-09-25T20:27:36+03:00
Zn + H2SO4 ---> ZnSO4 + H2
65 g Zn.......98 g H2SO4.........1 mol H2
x g Zn...............y g H2SO4.........2,5 moli H2
x = 162,5 g Zn
y = 245 g H2SO4
2 3 2