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2014-04-23T22:59:18+03:00
1 mol NaOH.........1 g H
2 moli NaOH........... x g H       x = 2 g

40 g NaOH.......1 g H
2*40 g NaOH.............x g H       x = 2

masa molara NaOH=23+16+1=40g/mol
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