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V=200cm3=0,2 dm3
Cm=n/v
n=Cm*v
n=0,08*0,2
n=0,016 mol
mC2O4H2=90g/nim
90 g - x g
0,016 mol- 1 mol
x=1,44 g (ms)
Cm = 0,08 mol/dm3
V = 200cm3 = 0,2dm3
n = 0,08 mol/dm3 * 0,2dm3 = 0,016 mola
ms = n* M
ms= 0,016mola * 90g/mol = 1,44g