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v=1,2dm³
Cm=2mol/dm³
n=Cm*v
n=1,2*2
n = 2,4mola
5)
v=3dm³
Cm=0,5mol/dm³
n=Cm*v
n=3*0,5
n = 1,5mola
n=1,5mola
v=5dm³
Cm=n/v
Cm=1,5/5
Cm = 0,3mol/dm³